I did head out a couple of weeks ago, and it was a blast. Meant to post back here, but...<lame excuse goes here>
It was my first time out there, and the guys were pretty friendly. We had long chat with Mike (the owner) and another Mike... who had been instrumental in designing some of the courses. Unfortunately, some of the ATV trails were closed that weekend due to a race, so we were restricted to the Jeep trails.
If you're going alone (i.e. one vehicle), I'd highly recommend having a winch and making sure you have a winch mount point before you get into any mud. They look VERY deceiving!! I did get stuck twice -- the first time I wasn't paying attention, and thought it was "no big deal"... and ended up rocking myself out. The second time around, I had to winch myself out... I had lost all traction because of the really sticky mud, and also not getting enough wheelspin on the Rubicon 4-Lo to spinoff any. I've since heard that in the Rubicon, 4-High is pretty much "good enough" to go through mud, and 4-Lo should only be used for rock climbing & climbs. Sounds reasonable, but I'm yet to confirm.
But all in, it's a great place. They have some facilities for camping, cabins, etc., and although we didn't utilize, seemed good.
The one negative was the map -- maybe it was me, but reading & following that map was possibly the toughest bit of being on those trails!!