Thanks to all for your input, very informative.
We have been calling and we've confirmed that many establishments will have closed for the year, but it's not a deal breaker.
The weather may be trending into fall, but we grew up in Western Washington, so we will be fine.
We realized at Carlsbad Caverns that being underground isn't "our thing", and we're spending time at Wind Caves just for the wildlife viewing and the fall colors.
I do know that Custer's Battlefield is in Montana, I visited there once many years ago.
Again, thank you for taking the time to share your input.
