Me and adam were at the midlewood meet and it was below 0 deg at night. it was warmer in the day as you'd expect. I don't think kids feel the cold anyway and when the pig is roasting it will be toasty warm.I'd like to be pencilled in as a maybe, depends how cold it is, as you know Oli is still young and I'd rather not give him a bad experience and put him off camping.
We now have under blankets so I guess the nights would be warm enough just a bit worried about being out all day in potentially freezing weather, although with the good old British weather it could be T-shirts and lollies all round!
I'll pm you about the meet and kids.