The Hop Farm is a good one.I have been there in the past with other car clubs loads of parking.They also have a large kids play area they do food but can not comment on that as i took my Sandwiches/Drinks with me
I realy liked the
Laughing Fish (Isfield) with the parking out the back i know the food is not for kid's but there is the steam trains there so if there is a meet there in the summer i would bring the kids along picnic by the car then ride on the train they would love it.