A hitch and hop wrote:
If you have the time, a nice route would be to go north on 120, 72 to Billings and follow I-90 east to Devils tower. On the way, I would suggest stopping at Hardin and look at Little Big Horn National Monument. There are several guided tours starting around 10:00 AM. The hidden treasure is Big Horn County Museum at Hardin. They have about 36 acres with old buildings and many antiques. Great family museum with lots of things to touch. There is a nice KOA at Hardin. We just came east on I-90 pulling a 25 ft FW with a 1/2 ton GMC with no problems. The biggest hill will be on Hwy 14 when you turn off I-90 to go up to Devils Tower and then back to I-90. I-90 into Rapid City is fairly low grades. There is a RV park outside Devils tower. ( no facilities) It is about 400 miles that route.
I HIGHLY recommend both these stops, they are WONDERFUL. The Little Big Horn Monument is beautiful and historically fascinating. The Big Horn County Museum is fascinating---it is truly a hidden gem.
Another great hidden treasure is the museum in Thermopolis, Wyoming. Thermopolis is a quirky little town with all kinds of hot springs and this great little museum.
Otherwise---go down a grade in the same gear you went up, usually second or third. Keep your foot off the brakes as much as possible. Get up a good speed (as much as is safe) before you hit the uphill climb. Just take your time. You have a good amount of truck for your size trailer, you will be fine.
