I've said (twice) that I just think it's a bit weird to invite someone on holiday when you can't travel together, especially when that means OP can go straight there by car while her friend faffs around getting taxis and trains and waiting around for lifts.
I disagree. Over my lifetime I have been lucky enough to be able to have free accommodation in various places if I can get myself there
Nor is it necessarily a 'faff'. If you don't drive, then that is how you normally get places. I am not sure why some posters are so horrified at the idea of using trains. I do drive but sometimes choose to take the train places.
But in this case OP wasn't clear
We don't know that. Plus, it ought to have been inferred by the friend, or, even if she hoped otherwise, she could have simply said something like "Ooh, that's kind, I'll check out the train times and let you know if I can get there" to which (if it were a possibility of a lift then the offerer would say "Oh, you'll be able to come with us, we'll take 2 cars" or whatever. But the default assumption would be the accommodation is on offer if you can get there, for me.
It’s one weekend. Not all families going camping / caravanning go on ‘trips and excursions’ - for some being onsite is the main event.
Jeepers that sounds boring!!
Wow @hopeishere , how is it "boring" to spend time at the seaside ?
The beach is entertainment for hours, day after day in nice weather. Then may sites have a pool on site, sometimes trampolines or tennis courts or crazy golf. Some have a club house. Some seasides have all sorts of entertainment on the front, others have lovely coastal walks.
How very bizarre that you couldn't entertain yourselves as a family for 72 hours
She doesn't want to travel at that time of night, its leaving at 3pm in May.
Wow. Just wow.
this says everything about the friend.
I really hope, OP you have just said, "Oh well, it was just an invitation, if you don't want to we can just leave it. It will give us more room in the van anyway."