The bike your looking at has a suspension fork if I'm correct. I'm curious to see if anyone has thoughts on that for a touring bike.
The OP is planning on riding the "GDMB" (Great Divide Mountain Bike) route which is an off-road route and a suspended mountain bike, or at least a suspension fork is highly recommended. This is not a road tour and a standard road touring bike is not recommended.
To the OP: The bike seems suitable. The frame appears to have mounting points for a rear rack but be sure the one you buy will work with disc brakes. There seems to be no provisions for a front rack so, if you are really going to be self-contained at times, plan to travel light.