You might check out this link. Click on "Lodging". Maybe you can get an idea of market pricing, or even arrange to be listed here.
http://www.mountainmancountry.com/Usually oil patch per diem runs $80 to $100 per day..... In an area like this however, (and around Jackson Hole, Cody or even Cheyenne during Frontier Days) most companies will have to pick-up 100% of expenses, they have no other choice (except the man-camp scene). I would think a weekly rate would be something to think about. Hardly anyone goes up there for a day or two.
BTW, Some of the convenience stores/gas stations get pretty creative with "fast food", many having hot food sections with everything from breakfast burritos to fried chicken lunches. And you can get it at 0530. The bars catch some of the dinner crowd with burgers or pizza.
~thirdeye~