I don't know what you preferences are ... I strongly suggest that if you are going to cross the Bighorns you NOT use US 14A or US 14 ... US 16 is a much better route to cross the Bighorns
If you are going into MT to visit the Custer battlefield, I strongly suggest that you NOT enter on US 202 through Red Lodge, MT
On your way in (or out) I highly recommend that you visit the museum in Cody, WY ... it is one of the three best museums that I have been in ... it is actually 4 museums in one: guns, western art, native american, and Buffalo Bill Cody.
2004 Winnebago Journey 39W - 2012 Buick Enclave
Present @home Home: Oshkosh, WI
We call our rig "Ernie the Journey"