In 2014 it rained so much that campers were mired in the mud in grass fields. Some of them flooded because they couldn't be pulled out. So make sure you are not in a lower-lying spot in a field.
Lots of generators running 24/7, basically a big parking lot full of RVs.
We stayed at the former KOA, now Breezy Hill Campground, in Fond du Lac. About a 20 min drive from EAA, out of the noise but not too far away. It's a very nice RV park with some well-maintained seasonal sites. We definitely would stay there again for EAA. Call NOW if you want to reserve a site.