I hadn't seen IM2 but I did thoroughly enjoy IM3 and I thought Ben Kingsley was hilarious ... it was really nice seeing him doing something that I'd never thought about him doing!

Good luck with the babysitting! 10 year olds are at least a bit easier in that you don't have to be constantly watching them but I wish you all the luck as I'm really not a children person!!

Hope you have/had a good time camping!