From Utah!
My wife finally convince me a few years ago to give up the tent and "sleeping in the dirt" for a travel trailer roughly the same as your Hideout. Fast forward a few years and here we are with a 30' 5th wheel. Get ready for some comfortable "glamping" with hot and cold running water, thermostat controlled heat, a dry place to cook and a queen sized bed.
If planning a Yellowstone trip, reserve early, at least 6 months in advance. And, don't miss Teton NP. I think it's more scenic and more wildlife too.