We just completed a 13-day roadtrip circuit that started and ended in Las Vegas.
Total miles driven: 4,819 (average per day = 371)
Longest Day was 642 miles (Santa Cruz to Klamath Falls, Oregon)
A couple of days we drove less than 50 miles (around Walla Walla, Washington)
Most travel days exceeded 425 miles.
Fuel cost was $51.18 per day [$2.50 per gallon)
Food was $52.97 per day [2 restaurant meals + 1 cooler meal per day]
Lodging was $102.02 per night (double bed rooms or suites with two adjoining rooms) [All had high-speed internet except for Wallace, ID]
Kettleman City, CA -- Best Western: $90.00
Klamath Falls, OR -- Shiloh Inns: $135.00
Pendleton, OR -- Red Lion Inn: $87.00
Walla Walla, WA -- Best Western: $87.00
Wallace, ID -- Stardust Hotel: 67.00
Havre, MT -- Super 8 Motel: $95.00
Idaho Falls, ID -- Best Western: $139.00
Ely, NV -- Ramada Inn: $139.00
Attractions visited included Mt. Shasta, Crater Lake NP, shoe trees in Oregon, Washington and Nevada, the National Bison Range in Montana, Glacier NP, Havre, Montana, Lewis & Clark routes, EBR-1, Craters of the Moon Nat. Monument, the "lonliest highway in America" and the California Big Sur coastline.
Average total cost per day: $183.00 for three travelers -- we tended to stay at the nicest lodging available in each town and ate in comparable restaurants. No fast food snacks.
Best Finds -- the "family suites" available at Super 8 Motels -- 2br-2ba rooms with ample work spaces and comfortable beds. Most amazing urban view -- room 98 at the Best Western Driftwood in Idaho Falls, Idaho. Most unique motel room -- #100 at the Copper Queen Ramada Inn in Ely -- counts as the high roller suite. Best waitress and hamburger: Sports Club Cattle Baron in Shelby, Montana. Best breakfast: Eureka Cafe in Eureka, Nevada. Most amazing rock and mineral shop: Wally Marks' Hwy 50 Rock Shop in Fallon, Nevada. Most amazing road: no contest: Going-to-the-Sun Road in Glacier National Park.