Just completed a 3,000 mile tour to and through Montana. Glacier, Beartooth Highway, Seely Lake, Highway 2, logging and minning roads to high country lakes and 8,000 + foot summits.
Some of the best roads in America! World-class scenery, lots of space and few cars. I highly reccomend Montana to anyone -- especially GSers!
Rooms were cheap (by California standards) and everyone was 'BMW' friendly. (I think the badge makes a positive statement with the general public.)