For those of you who don't know how to get there, the turn off from Redwood road is almost exactly 25 miles south of the Redwood/ Lehi Main St. intersection. The turn off (turn right) is directly after a small farm house. You'll drive the gravel road for over a mile and when you're passing some large rock outcroppings on the left, the "little Moab" playground area is a few hundred yards off the road to the right. There are plenty of places to park and camp and low trailers are ok. Pets are ok as well I imagine. There are also a few fun playground areas to the left of the main gravel road around the large rock outcroppings.
I like Little Moab for an event like this because you can stand in one spot and see many rigs at the same time trying different lines on the hill. You're not stuck in your rig on a trail waiting for the guy 6 rigs ahead to get over an obstacle. (that's a whole different kind of fun, just not ideal for an event like this)
I will note that shooting is allowed in the area, so be cautious of shooters out there and where you're parking your stuff.