How are you setup currently? I ran the Rubicon last spring/summer time frame and LOVED every part of it. I can't wait to go back there. I run an '05 LJ Rubi with 33's and every piece of under body armor I have is thrashed-well, CA mounts, diff's, etc. The Medic TT/Engine skid and Savvy gas skid did their jobs nicely with nothing other than a few scratches. The sliders got used a lot too so I'd say if you have that covered, you should be OK. It's because of that trip that I'm going to scrap my current suspension and rebuild entirely.
I run Rancho 9000 adjustable shocks and had my fittings mounted OUT thinking if I pointed them in, they'd contact the tube. I sheered both of them off the rears in quick order so after installing the manual knobs, left them where they were. I bent both my lower arms as well. Oh-also sliced one of my BFG MT's. They have over 55K on them now though so I'm not surprised. Blew a bead (my own stupidity) but other than that, faired pretty well. My engine was throwing misfire codes pretty good for a bit and it actually killed me coming down one obstacle that I'm pretty sure is where the arms up front bent. When the engine died, I fell off a rock and landed pretty hard on the front end.
The part about "stock" TJ/LJ's traversing the Rubicon I would like to see. We were told the second day at Rubicon Springs that we were just a couple hours at most from a paved road, so I opted to stay the night (for the 3rd night) thinking we'd get out early and get a good start home for our long journey back to WA. When we started out up Cadillac, two mostly stock TJ's were hung up at the bottom switchback, just up a hair from there. It took us most of the morning and into the afternoon to get the two of them out. They said they'd just made it to the springs and decided it was too much for their rigs, so they spent the night and headed back out the next morning. From what we had just done the two days prior, this was I think about the easiest section to cover. I'm not saying it's NOT possible by any stretch, just that I don't think I'd want to do it in a bone stock rig-you'd be pretty well trashed by the time you made it out. I think the setup I have is about the minimum I'd feel comfortable with knowing I had a 1400 mile drive back home.
A JK spent a few nights on the trail if I recall for a broken shaft on his steering gear-sheered it right off where the pitman arm attaches. His buddies in highly modified JK's made a few trips in and out trying to get back to him unsuccessfully. I bet TenaciousTJ could give you more details-I'm a little fuzzy at this point, and he and MTDirk spent another few days down there. Regardless, it was a bad break and tough recovery. A mostly stock old Willy CJ made it about 1/4 mile in before blowing his rear end and needing to be towed back out.
If you are armored well and have a small lift with at least 33's, I don't think you'll have any trouble other than some grindage underneath. I sure had a blast and it was one of, if not THEE most fun I'd had on a wheeling trip yet. That scenery there, the wheeling, the good company of some good friends, the trail itself-absolutely incredible. I LOVED every bit of it and can not wait to go back. Honestly, if I had a choice between going back Moab tomorrow or the Rubicon, I'd take the Rubicon hands down.
Be sure to take plenty of food, water, clothing just in case and some tools to be safe. Plan for two days on the trail minimum-you'll have a blast for sure and may want to stay longer. I bet you could do it in one LONG day but it wouldn't be as much fun I don't think as taking your time.
Have a blast and be sure to post up a ton of pics!!!
Best of Luck,