As long as you are the lead car, you won't get any dust! I had to roll up the windows and turn the A/C over to the "circulate in cab air" switch! My buddy's Jeep did't have much dirt on it. The trail...
We started easy on - Wolfden (89), then turned onto Slab Pile (79), the onto Rocky Mtn Loop (92), got to the part of the trail that goes STRAIGHT up (on way takes you through a deep rock rut, they other way takes you through a tough place for a stock tj) and then we turned around. We ended up going down the other side of the 92 loop and then headed out.
For the first try at the off-roading, it was a great time! Saw a guy almost flip and then smash his undercarriage crushing his driver side running board. Guess he will invest in rock sliders!