I rode my XR400 there, not too bad but did a hard high-side and bruised my chest bad
My daughter rode her XR80 around close to the truck, didn't have much fun. Saw another lady ride an XR100 all over the place, although she had some trouble with a couple of the hills.
On my KTM 640ADV - rode to the parking lot, talked with some ADVriders, left without trying. No way!
Gasgas 300 2 stroke - just right! I could throw huge rooster tails, and fly off things with ease.
Saw another ADVrider try to ride a KTM 950 there - he crashed in the parking lot and ended his ride early.
I'm planning to try out the WR250R there but not expecting great results - not enough power.
It's really just a big play area, and the roads around it are private so don't stray...