I did a hunt with Diamond D Ranch in Stanley, ID. Sounds like exactly what you are looking for. Id be happy to answer any questions you have, it was a great/successful trip and also my first elk. Highly recommend them.
Did this 2 years ago with a 33 hour drive. Put a couple chunks of dry ice on top and it was good. Make sure to tape the lid or put something heavy on top, bumps in the road can bump the lid open.
I have had a Bradley for a number of years and love it. It is a 4 rack model. It uses the wood pucks that you can preload, set the temp and leave it alone. I’ve done a wide range of things with it and for sure recommend.