As you leave your dad's old area, further west is Lake Scott State Park, just north of Scott City. A little strange driving thru all the flat wheat fields and then suddenly dropping off into canyon with a spring fed lake. Take your car off the truck, or just use the truck to go to Monument Rocks National Natural Landmark. Interesting to see. I believe someone posted on FB that they were just there. I would take the car, easier to wash afterward!!! Larry may be in the little store/fishing place at the end of the rv area, and he can give you instructions on how to get there. Larry was the guy who was involved in the early years of the HTD Rally. Nice guy.
I don't know Deer Park, UT, so you are on your own.
You always have Diamond RV Park up in Woodland Park, CO for a stop on your way up, or back from Deer Valley. We are going to see Daniel on Wednesday. We are staying in Rye, CO until next week.
That's about all the help I can be. See you in hutch.