We are in the planning stages right now. I've never been, a few coworkers have but they are hotel people. I am taking the TC and my family loves the outdoors, animals and hiking. We are thinking early...
Lots of great advice about Yellowstone and the Tetons. You can go about anywhere with a TC
FWIW - Lots of folks overnight at the Walmart in Cody. The museum in Cody is well worth the stop, but plan on most of a day to see it all. Their firearms collection beats the NRA museum in Virginia!