I am NOT familiar with the Tri Cities area, I have driven past it many times but never really had a reason to stop. That being the case, PM me your contact information, maybe you can suggest a truck stop or someplace close to the freeway that I can get and out of easily.
When going to Moab I usually spend the first night at a truck stop about 30 miles east of Boise, then make Moab the next day.
Next time you're in Pahrump, try Mom's Diner. Great food, large portions, and reasonable prices.....a deadly combination. And if you're in the truck, there is a vacant lot across the street for parking.