From Bozeman, MT, Hwy 191 is a very good road for RVers.
However, I definitely would not recommend taking 33/22 into Jackson. You will encounter a very steep grade on 22 east of Victor.
You could take 33 and pick up 31 which brings you to 26 to Alpine, WY and then north on 89 to Jackson.
Or...you could take Hwy 20 south of Ashton to Idaho Falls and pick up Hwy 26 to Alpine. Hwy 26 is a beautiful, easy drive.
Do NOT take Hwy 22 into Jackson. Have a good trip!
Full-timed for 16 Years
. . . Back in S&B Again
Traveled in a 2004 Newmar Dutch Star 40' Diesel