Although we didn't camp, my daughter and I didn't mind the mud. We both brought extra clothes and boots because I had a feeling it would be that muddy. Actually, I would almost rather it be muddy than dusty (we both have bad allergies)..
Vendors area mud was nothing like the camper side; it was sticky clay that grew on your feet with each step, and as water collected, it became dangerously slick. I was far away from the entrance, so I kept thinking I was lower than the others and had more slop.