Awesome pictures! What would say the minimum rig requirements are for the trail?
depends on a lot of factors including the driver's experience... a short wheelbase like a TJ probably 32's and 3" lift. larger vehicles like mine still scrape stuff in places on 35's and 6". we had another WJ with no lockers and he made it, but he worked really hard so i'd recommend at least 1 locker.
all that said, i know they supposedly take stock current grand cherokee's and fj cruisers and so forth in there, but honestly i have no idea how. it can't be pretty... either there is a ton of stacking and or bridging ladders used, or else i'm sure they are just thrashing those rigs.
also, FYI, George did it in 2 days previously no problem with only 3 rigs, all short wheelbase. we took 3 and half days with 8 rigs (2 XJ's, 2 WJ's, and 4 wranglers) - we had a variety of driver skill too.