The banana belt in WY is the Big Horn Basin. Thermopolis, Worland, Greybull Basin, Shell, Ten Sleep.
More important we don't get the wind that the southern corridor gets..probably due to being surrounded by mountains.
Sheridan and Buffalo ain't bad eithe similar temps but more moisture. Hulett and NE is fine as well.
Pinedale and Dubois are great little mountain hamlets, too.
I love daily sunshine and the fact that water is pumped out of the ground and rarely falls on my head. Winters will be a bit more harsh that Oregon, but given low humidity easier to endure IMO. And nothing is quite as magical as crossing the Big Horns in the middle of a winter storm...simply spellbinding (just carry a kit in case you get stranded). Our old school, heavy, gas guzzling Bronco just powers thru anything making the delight all the more thrilling.