I was planning on taking some new offroaders to SLOHV next weekend (4/28), but they have some events planned and will be closing the park early.
What I love about SLOHV is that, for me, it isn't about seeing how crazy I can do things, but enjoy time away from things and have a good time. I don't want just trail rides, but I don't want to be going through 4' deep mud holes and rolling upside down over rocks. SLOHV does have some technical trails where it isn't overly challenging, it requires some precise driving or you can end up upside down.
People may rag about SLOHV being easy, but it is a great place for beginners and for those who are what I'd consider mild to moderate wheelers because it has enough challenge as far as mud, hills/off-camber, and rocks that you can learn what your rig can do without being too bad. If you want a more extreme offroad experience, Morris Mountain or Greyrock would be better choices.
Though I'm sure some of the TJ's and JK's at the 2010 Jamboree may disagree.
Even when I wheeled with undercoverfab last summer, we had some fun times going up some of the hills (after we removed downed trees to do it)! Sometimes, you just gotta know which trails to take.