It depends on what you like I guess but my money would be on Riverside CP at Tiddington .It is about 1 mile from the centre of Stratford (easy walk) and they do at times run a boat taxi from the site.Obviously it is alongside the river,the toilet block has underfloor heating,and the village pub does good food.Charlecote park is just down the road.
Others might be Dodwell Park or The Ranch at Honeybourne.