I'll cut this down to long story short.
The reality is, that by the time you factor in all the regulations, the odds of you finding a natural made trail or play area on any publicly known DNR land that will satisfy those with bigger rigs is nearly non-existant.
What you are looking for is going to have to be all man made, and it probably won't be trail, it'll be obstacles to play on.
The user group has changed, the LAND hasn't. As being one of this bigger rigs, I ended up making the decision that it made a hell of a lot more sense for me to change and shrink my rig than to try and force an inanimate object through a regulation burdened government agency to change.
Why spend my time fighting to try and get something I likely won't ever get. If I enjoy the sport, not my rig, but the sport, It's wiser to just adjust the rig, fit the larger population of 33 to maybe 35" tires, and enjoy life more.