If you are running a rig with small tires, 29s, and then two decent autolockers and a winch, what's to keep you from buying rockers and serious underbody armour and basically pull-grinding your way (kind of skateboard style) over rocky trail terrain that you can't clear? Obviously with the low clearance afforded by the 29s, you underbody is going to hit everything, you won't be able to take big stair steps without dragging on your rockers for about 5 feet until your rear tires finally get some traction.
Know that sounds insane and a breakdown waiting to happen . And, I am waiting for experience (Jeffy, SMC) to say "Chris, you might be able to get away with that a couple of time before you get stranded and are riding back in somebody elses rig..."
Here's the thing -- my rig has 29s and sure, I could go for some bigger tires, 33s or 35s, who wouldn't? But, the cost of doing it right, the tires and wheels, 4-6 inch suspension lift, larger front/rear axles, 4W disc big brakes all around, poly bushings, driver activated locker upgrade, drive-train upgrades, and reGearing, maybe even engine swap and upgrades and synching all that new gear up properly .... heck, for the price of all that I could pick up a new BMW K1200LT bike or maybe two. I guess you could delete some of those items, do the install work yourself, etc to save some cash.
Guess you could probably do the pull-grind thing, but you'd be doing more than the average amount of damage to OHV trails, there may not be any place to fix your winch cable around, etc. Makes me think that they should come out with a new rocker design in which each rocker supports 50 or so 1-inch diameter alloy wheels on bearings that essentially allow you to roll slide your Jeep's body up stair steps, despite body contact.
4Bangers should patent this, if something like it hasn't hit the market already :D Course, the rockers are not the lowest point of a Jeep in the center of the vehicle, etc.