We stayed at Grafham Water for a week at the beginning of September. We had a service pitch, which although of reasonable size was very close to the next pitch, with only a very narrow grass partition. The site itself was very pleasant and peaceful. It's division into two halves, as far as traffic movement was concerned, added to the calm feel. Although for motor vans it did mean exiting the site to access the service point. Facilities were of the normal high CC standard. It is conveniently situated close to the reservoir, which looked good for fishing and water sports and has a good cycle / walking track around its 9 mile circumference. We found this is a pleasant walk with plenty of benches for sitting and having a picnic. Or you can stop at the Wheatsheaf pub in Perry or Anglian Water Cafe near the sailing club, both about half distance. Wimpole Hall  23m, and Houghton Mill 9m, both National Trust, are well worth a visit, as is Paxton Pits nature reserve 4m. Of the supermarkets Tesco, on the ring road to the north of Huntingdon, was easiest to access. However, there is a very nice Waitrose in St Neots. Both our O2 and EE phones worked well for calls and data. Buses however are very few, so little scope for using these to get around.