Bought our first caravan!!

Thanks all that gave us advice on buying a caravan, we have taken the plunge and bought this:

http://www.caravanfinder.co.uk/touring-caravans-for-sale/6berth-caravans/avondale-rialto-640-6-used-caravan-2001-staffordshire-pk01a5156

I know its not new but it has everything we need and a genuine seller at a good price, deposit paid and collect next weekend. Looking for ideas on good campsites for young children, our kids are 8, 3 and 1. Mainly need child friendly sites for our 8 year old, so he can get out and meet other children and play, we also have a dog.  We live in Kent....

Thanks all in advance....