LOL Colorado will test your vehicle, I was at 13,000' last weekend with the wifey, my 96 V8 passes just about everything up there, thanks to the cam and breathing mods.. with 3.73 and 33's though it could us some more help
Isnt 3000-4000 rpm where these suckers are supossed to run? LOL
Dont sweat it Jon! my first trip to Moab I was sitting on 30" tires with a 2" lift, you are not going to be able to hang with everyone on the first trip, it should just be a starting point for learning about what is needed and why. No need to be emberassed although I know the feeling looking back, I was so worried about picking the right line (I didnt even know I was going to be picking lines before I got there hahaha) keeping up with the group, making sure my truck was working, etc that I almost forgot to look around at Moab! we expect newbies to have issues and a big learning curve