Reiter was awesome. I was very impressed with how the Jeep held up. I know my old S10 Blazer couldn't have made it through have of the stuff I did.
If you have a stock Jeep, don't be afraid to take it offroad - remove the sway bar links and you will have quite a bit of flex to get over some of the tough stuff.
The thing that surprised me most is how well street tires held up on the trails - lowering the tire pressure sure helped a lot.
2003 Jeep Wrangler X, Auto, 4.0L, 33x12.5's Mud Kings | Perkins Performance: 4in custom long arm with adjustable control arms, custom front and rear bumpers, and custom rocker guards