How would you parent this situation?

It comes much much earlier. If you follow through when they are 3/4/5 and make it clear mum and dad are in charge it doesn't occur to them that refusing is an option.
My kids know i could make life pretty crap for them, no tv, no screens, no treats, and they know those are not hollow threats, i will absolutely follow through.
And i absolutely would go and haul them off the sofa and to the front door. We also dont accept disrespect /demanding/ attitude from our kids either.
The result is they are happy, secure, and feel confident that they do not need to worry - we, their parents, are in charge, we've got this. Children WANT their parents to be in charge its what makes them feel safe and relaxed.

Going a different way but we’re all her celebrations in the last day or so? Were you all up early or travelling that would cause her to be tired? Is it hot? I was getting so irritated with the kids refusing to do stuff this summer but then when I realised eg how far they’d walked, or high temps that day for example I felt bad

Does she often miss out on things she actually wants to do when it turns out theres a long walk or a lot of standing around?

I was like that as a kid... long story short, I have Ehlers Danlos syndrome, which made walking and standing really hard work and very painful, but I didn't tell anyone it hurt, because I genuinely thought thats what it was like for everyone, therefore I was just lazy/a wimp for minding it.

Not remotely suggesting she has the same thing as me... just suggesting that missing out on stuff you really want to do, because of something that shouldn't be a problem physically, does suggest there is something wrong.

Laziness? You omitted that option.

Sympathies op. You know you can't motivate your daughter to do something she doesn't want to. Just put it down to experience and if she asks about going to festivals in the future say you're never doing that with her again. If you enjoy festivals can you leave her with grandparents next time?

Tbh at only 10 she doesn't need a phone full stop and if i were you I'd really consider removing that long term. Whatever she claims, its not the norm to have one at 10, its much more typical to be getting one at 11 or even later, closer to 12 as they start secondary.
It will take a while before you see really improved behaviour but id bet that after a few weeks of no phone anymore you'll see a difference. Screens really, really impact kids and teens. Its scary.

I meant to be able to call her. You could leave it locked

I’ve never had this with my kids.

but I try to react to everything with such enthusiasm and it seems to work

beed to pop to the shop? We make it an adventure and draw maps and gets presents (pretty stones) along the way etc.

maybe do something like this?

my kids are 12 and 10 and love this stuff. I make it all about magic (when buying the milk! 😆)

Can you get her to go places at home when she doesn't want to?

Does she like the places when she gets there?

That's the last thing I'd do with a moody sulky child.

If she hates walking was this ever going to work?

Leave her with a phone?

I mean. Could you not leave her in the tent? She’s old enough to be left for an hour or so surely?

Exactly that @Laundryliar sometimes there isn't a 'reason' they're just bloody awkward. I hate how we have to try and explain everything away now.

I find in incredulous that many people maintain they can't make their kids do anything if they don't want to. Explains a lot!

Agreed op. You'll get a load of people trying to find some imaginary 'reason', you'll get told shes anxious, overwhelmed, maybe even autistic, and that you must spend ages super gently pandering to it and finding out what's wrong.
When its highly shes just being a bit lazy and pushing boundaries so its time to remove the screens and tell her to shift!

Quite a few of our holidays have been affected by children suddenly taking against something they previously enjoyed. We go to a small festival every year. The last two years our son now 15 has basically stayed in the tent only emerging to buy himself crepes. He watches a couple of bands the whole weekend. Despite (or because) of this we all really enjoy the festival in our own way. It gets easier when you can leave them alone. My daughter suddenly decided she hated sand one year when she was about ten. (We were on a beach holiday at the time) She got stressed out on a campervan holiday because lots of grass got trodden into the van and everything was too small. I think part of family holidays is learning to be flexible and accepting that four very different people are not going to enjoy everything all of the time.

Could the reason may be, she would prefer to sit in the tent watching youtube, rather than go out?
Kids don't always have a genuine valid reason. Its a bit like sometimes they would really like to eat a bowl of chocolate cereal for dinner. Sometimes they want stuff that isn't very healthy for them.
As a parent you need to meet your kids needs. Their needs, not every want. Its okay sometimes to say no, or not let them do something they want to do - this is called being a parent!

If you've never had a DD like this, you don't know what it's like. Telling them to move their arse really doesn't work.

My DD would have sat in the tent for days without any ents. The removal of any home privileges wouldn't have moved her. She would have had to have been dragged kicking and screaming out of the tent, and then dragged to the festival.

I'd have had a miserable time supervising her in the tent and she wouldn't have cared.

Solidarity @Himitsu . I'd love to say X or Y worked, but there was nothing I could do/not do to get her to do what I wanted when she didn't want to from the age of 8 onwards.

She's only 10, it shouldn't even occur to her that she can willfully ruin it for everyone. Once this is dealt with you have a limited time to put boundaries in place and teach her she isn't the centre of the world, before the teenage years, or you'll have an awful time of it.

She absolutely should not have a phone, people too immature to leave the tent or consider other people do not deserve the perks of adulthood. She needs to show you she can make good judgements and be kind before being treated as an adult.

Anxiety is hard to deal with. You don't use it as an excuse to hold your family hostage in a tent.

@turkeymuffin you have just reminded me of a time when we were on holiday and my 13 year old was being awful.

He refused to walk just wanted to sit down and complained about everything. He kept saying his feet hurt so I say fine. If your feet hurt your shoes must be too small let’s go and get your feet measured, thinking I was calling his bluff. Turned out his feet had taken a sprout and his shoes were two sizes too small.
it was amazing how the right fitting shoes changed his mood!!

Sorry but why does everyone jump to 'anxiety' for every little thing teens and preteens do now. Maybe, just maybe, shes worked out if she says she has a headache she gets to stay back and sit on screens.
It should not be the default expectation that children and teens are 'anxious' some people are literally putting these ideas in kids heads i swear. Kids this age are known for being stubborn, wanting their own way. Pushing boundaries. Its not the time to start being a pushover parent its the time to reinforce boundaries!!

So many people here mind-reading and making assumptions about what kind of festival it is !

I disagree about packing up and going home but believe there would be consequences when we got home.

If her head hurts, I'd be giving her a dose of Calpol and telling her to move her bloody ass. Not a chance I let a 10 year old dictate to me or sit and sulk. She could sulk and have a face on doing whatever we're doing but she'd not be ruining it for me or anywhere else. At 10, they don't get to make the choices.