Some observations: The west winds can be tough around Casper but I rather like the dusty, windblown city. The Owl Creek campground near Riverton is one of the nicest I've ever stayed in.
Dubois is a fine town - lots of cowboys, good restaurants and a campground right in the middle of town. The climb over Togwotee Pass west of Dubois isn't too tough but climbing over the Big Horns will give you serious bragging rights. The climb on 14A east of Lovell is 10 degrees for 13 miles and it's much the same on the other side (Burgess Junction-Dayton). I never did Powder River Pass between Worland and Buffalo but I'm sure it's no picnic.
Riding the shoulder of interstate 90 between Buffalo and Gillete is a lot of nothing - about 60 miles. Pack plenty of water.
I did Gillette-Spotted Horse-Sheridan in one day. A mistake. Well over 100 miles, lots of climbing and I almost ran out of water. I should have stopped for the night in Clearmont. There is only a little bar in Spotted Horse but there was a small restaurant in Leiter. There is nothing at Ucross - the intersection of 14 and 16
US14 out the east side of Yellowstone is narrow, winding and heavily trafficked until you get out in the open but it can't be avoided.
In Jackson there is a nice campground opposite the Visitors' Center. Also, in Jackson, don't miss the Western Art Museum north of town.
The cafeteria in West Thumb, Yellowstone has about the worst food I've ever eaten.
Allow plenty of time to see the sights in Yellowstone. The crowds can be bad but there is a LOT to see. And a bicycle doesn't get stuck in traffic. Don't let "Campground Full" signs in Yellowstone stop you. They'll usually let a cyclist camp, especially if you look really pooped.
US191 between West Yellowstone and Bozeman is a bad bicycling road - narrow, shoulderless, hemmed in by the river and full of impatient truck drivers.
This is a great part of the country. I love it out west and can't wait to get back out there.
This message was edited by litespeed on 4-6-07 @ 8:26 PM