You look ready! I dont know if you've been out that way before but it is a sight to behold. All of it.
If you are getting to the Big Sky/ Gallatin River area, make sure to drive the canyon on 191. Out by Buck's T4 at all? Make sure to eat and drink at the Corral.
Be sure to fill the gas tank if you plan on taking the 212 between Spearfish/Belle Forshe and Crow Agency. That's a long ride full of "nope, no gas station in sight." Save yourself some a$$-pucker factor and fuel up. We had some beautiful amber glow as we headed along that road while the sun was going down, though.
Some beautiful sights coming out of the Tetons headed southeast towards Cheyenne. I'd never been to Wyoming before. There may be other places more beautiful than that rt, but as a "yankee", that was sure stunning enough to remember. We should have hit Jackson but didnt.
Have a great time and get us some pictures