South Dakota, Wyoming, and Montana Speed Limits
One really cool thing about your trip, you can really blaze down the road in these states. I am not an advocate of speeding, but I noticed the limits are set at a liberal 75 and 80 miles per hour. (I always have added 5 miles per hour to the max speed, just because I want to :) So, getting from point A to B on your trip is cool! and fast. The last day of our trip, we travelled from Billings MT, to Seattle, in one twelve hour day, as we had already made all the stops we wanted to along this route. This still allowed about 6 or 7 stops along the way for gas, food, leg stretches, snacks, and photo ops....not a bad place to really make up time on the road. Also, if you find yourself in need of a Hostel in Missoula MT, there are several right near the College there. From talking with a few coeds who just stayed there, they said it was clean, safe and fun!
Happy travels! And please email or post some pics, especially when you are in Seattle!
Check back here in September
Thanks everyone who commented and helped me solidify my plans. If you think of it, check back here 8/27 - 9/15. I'll try to post how things are going while I'm traveling!