Feel like an idiot that I missed this until now. I was up there today and ran four fingers/ultimate adventure and some other lower level stuff since it was newbie run. I only live an ~hour away so most weekends It'll be an easy drive down day-of for me.
@ rock composition: My 2.5" spacer lift on a JKUR and full underbelly armor on 35's scrapes along with smart driving on 4-rated trails but their 5's require buggies to winch at times so you get a pretty nasty spectrum to choose from. I hate mud and rarely encounter it there but wet rocks are the norm so some significant tire slippage. Mostly tight,wooded trails but some rock gardens that make the big boys pleased to show off. Lots of options for everyone. There is a reason the park hosted several Ultra 4 races the past few years.
I was busy driving but might be able to get some pics from my co-driver/other folks we had along.