That dog is adorable, and it sounds like he/she is as much an emotional support dog as a pet.
Kids didn’t go to sleep until it was dark (10:30pm) and woke up again as soon as it was light (4:30am)…. If I could solve that…
You need some sort of black out, I have heard of people using space blankets and these keep the tent cool too.
I think with children you need them to be able to hold their bladder all night before you go camping, even if you have a toilet tent you have to go with them when they are little.
But you have to see a tent as somewhere to sleep and the holiday as what ever else you do around it.
You also need children to be exhausted.
This is why camp sites are so important.
Lots of 'jobs' for kids to do such as fetching water, collecting ice blocks from the shop, emptying rubbish.
The other thing sites have is other children. You cannot buy other children (well in some murky corner of the dark web, maybe but that's not what I mean) and they do a fantastic job of entertaining each other and exhausting each other.
I have memories of being one of 7 or 8 children skipping with older children turning the huge rope, with children running in and out, there was a countdown in several languages.
Another evening there was a football match.
So have a look at campsites, not just ones with tents but caravans and cabins and if you are in the UK prepare for it to rain for a week.