Hi Ann,
I thought I had posted a reply to this on Sunday, but it has not appeared. Thus trying again. It may be too late for you, but could be of interest to others.
We have stayed at Alderstead Heath fairly regularly as my brother lives in Reigate. It is a very pleasant well laid out site with all facilities to the usual Caravan Club high standard. We have always found the wardens very helpful and friendly. There is a good dog walk adjacent to the site. There is also excellent open downland a few miles away. This is at Farthing Downs. Leaving the site keep left towards Caterham and take the first left at cross roads in about a mile. Follow this lane for about two miles and it comes out onto the Downs, with a car park immediately on the left. On the way you pass Chaldon Church, which has a remarkable mural, which is worth a visit.
Reigate is good for shopping and restaurants. Also good dog walks in Reigate Park and the adjacent greensand ridge.
Cheers
Paul