On 20 from Rexburg to west Yellowstone it is very busy. It was a new paved road in 2016. Lot of boats and campers flying up the road. Once in YS it will take about 2-3 hr to cody. Id come into YS and head NE to Cook City MT for the night. Then take Chief Joseph HWY into Cody. Stay on main st in Cody, easy walking to stuff. Irma Hotel is historic if your into that. Cody Motor Lodge is nice to. I think I have spent 5-7 days in Cody. Its a must. Mexican place has great margaritas.
Cody is a must. July 4 is national rodeo, cowboys everywhere.
Motor Lodge is where the real bikers (high mileage
torturers riders) hang. LARGE times there, shootouts in the street, makes me feel right at home.

Not in a big hurry to go back, though. Had the Cody
SWAT Team come down on me last time I was there. No crap.
Cooke City after we escaped the Cody Posse.
