Going coast to coast this coming summer and I'm building up an Ogre for the Great Divide Route for about the same time as the original poster.  I've got 3 months to do it so my planned pace will be slower with some side trips into Glacier Park and a few days to a week playing around on HWY 12 outside of Missoula that I'll be scouting this summer. Our paths may cross.  I'm in SW Wisconsin.