Yes still have the 02 with 90k miles. it is kept up better than the most cars on the road. When I put the new hitch on last year I had to drop the fuel tank, it got a new fuel pump then. I do my fluids very often. trans every 25k, diffs every 25k and so on. I trust my truck more than a bran new car. not worried about power or anything, even my skills towing I am comfortable with. I think I would be more worried about the people not towing and new to mountains more than anything! there are more than enough turn outs to pull off and let others pass or to stop and sight see.
This trip wont happen till 2017, so those of you worried have until then to avoid me if your worried. and that's fine with me less cars for me to worry about! :B