My own visits to camping festivals are over for another summer, and despite officially being the wettest summer on record I've not seen that much mud.
Last summer I went to eight camping festivals. In every case there was more rain than any sensible festival goer would want, much use of wellies (tho I did get away with properly-waterproof trainers once or twice), and it was often far colder than you'd expect even with a British summer (the official stats confirm last summer as colder than this one too).
This summer has been quieter for me, going to just five camping festivals (partly because so little of the line-ups of so many grabbed my interest). With the worst of the summer rain being in June and July, I guess I got lucky with four of those having been from mid-July until now, because the result has been pretty good.
Of those five festivals, only one was badly muddy; another one was cold and dull. Of the remaining three, two have been in glorious sunshine without a sign of mud, while the last one did had a few heavy but short showers but not enough to get muddy and was otherwise pleasant with warmth and fair amount of sunshine.
It might have been officially the wettest summer on record, but for festivals it's not all been wet wet wet.