TheEddie is right on with trail details.
Though there's one more I've been on that he hasn't listed. This goes for anyone; be weary of the red trail. There are bypasses on it, but then you're not really doing anything. If you want to do the obstacles, underarmor, rock sliders, and a nice lift and big tires is almost mandatory. Oh, if you don't have a good spotter, you might even tip over at one point.
Not trying to scare anyone, but that's my experience with red. I took the first bypass after watching a TJ with a 4.5" RE LA and locked rear struggle and come very close to the very side of a large drop-off... I tried the last ledge climb to get out of the trail, but I was hopping and spinning too much no matter what line I took, and with my D35 rear I didn't want to push it any further, so I had to take another bypass.
The pea gravel, I don't like it that much. Atleast, my rig doesn't... lol. Wide tires and poor gearing (or a 4 cylinder engine) don't do very well. To take on sand/pea gravel, the best combo is skinny tires and alot of speed. (Doesn't hurt to air down alot too though)
Xander, you'll be able to do Orange just fine with a stock Rubi' even.
I agree that everyone should check out the Quarry and get used to their vehicle in 4Lo in many different situations. Heck, I still love the quarry, one of my favorite spots at the Badlands.