We headed south-west and stayed in Bannack State Park, where we were pleasantly surprised. It’s a great place for kids of all ages. Jackson (NOT Jackson Hole) is a small, warm, welcoming western town, here’s a link to Jackson.
Stayed in (and liked) Billings Montana then off to White Sulphur Springs and it was cold, sleeting and snowy and this was in August 2018 !!!!!! Remember you are in the Rockies.