i did w-e this summer from vancouver to boston along a northern tier/trans am type route. i left in mid june and spent 42 days riding to boston. the only weather related disappointment was that going to the sun road in glacier was still closed when i got there. other than that my weather was as perfect as possible (not including the headwinds) and i got to enjoy the benefit of the longest sunlight hours of the year during my trip.

check out my journal if you like: www.crazyguyonabike.com/doc/rosey2008