Does size matter? Of course not, a least in your case...
Those sites are actually the tour I want to make once in the US, so thanks for sharing!
I suppose is not the best to do it alone and, if I don't go wrong, is possible to make it in about one week, right? Did the bikes have some problems because of the altitude? In the Alps I ride up to 3000m above the sea level with no particular issues.
Great admiration for the gs1200 on that rocks!! (and for bikes of that size)