Great vid above.. moab is an awesome experience!
When I went to Moab in '11 i had an S with no lockers.. i ran just about all of the optional obsticals including wipeout hill, psm etc with 33s, PRG Advanced, skids, sliders but open diff front and rear. I made everything i tried..judicious use of skinny pedal and at least a moderate sense of where to 'bump." Granted i wheeled on bald tires, open diffs and manual transmissions since '86 (dating me i know.) So experience was there. IMHO Moab slickrock is traction city..
Of course since i've added locker lift and a titan swap..
i'm more able to ease over obs now..