I'll go in a few days if I have time, not that it will make any difference!
The surface may have dried out but the underlying ground is still very damp - the risk is that any substantial rain may have more impact than in a 'normal' year because it will be falling on what will still be compromised ground. If I didn't live here I'd head for the high ground on Field 2, and avoid the possible swamp in Field 1.
It would save a lot of tramping about if the organisers provided a water tap at the top of field 2 half the way along - shouldn't be too difficult to arrange once vehicle movements have been banned for the week! They may do so already - can't say I've looked........
Maybe put it on your feedback form?
Meanwhile, the sun is blazing, the icecream sellers are delighted and the beaches are packed.
It's far too hot for dancing though!