Damian, 99.999% of the time I think that the moderators on this site do a fantastic job, but you must have had a bad weekend. This is not the only harsh comment I have noticed. There are very few threads on this site describing Grafham Water. Also I would hardly describe the search 'facility' on here as easy.
Jo-Anne, we love the site, but beware some of the pitches are a bit tight. If you phone book, you can request full service pitches which should avoid you being on one of the tight ones. The access roads are OK, I have had much worse. Follow the CC directions rather than sat nav!!!
The reservoir is great for walking, cycling or fishing. The pools was not open when we visited (we were too early in the year), so I can't comment.