Triple Canopy is pretty good. Definitely lots of mud, trails here and there.
Most of the "parks" down here are setup mainly for mudding. There are some good trails at RYC though, but they get rutted pretty quickly.
I've only had my AC out at Devils Garden, which is the newest "park" out near Clewiston. It's brand new and is still very sandy but its a good setup. Has a huge swimming hole with a beach that is completely fenced off so people can lounge around and not worry about vehicles flying by.
All the "parks" I've been too are family friendly, but you have to remember with a few thousand people in attendance it's going to get nuts. I have plenty of friends that bring their families though.