Cincinnati to St. Louis (1 night) 350 Miles
St Louis to Topeka, KS (1 night) 311 miles
Topeka, KS to Dodge City, KS (2 nights) 271 miles Just stay one night here and use the other when you get further west.
Dodge City Great Sand Dunes (1 night) 359 miles
Great Sand Dunes to Durango, CO (5 nights) 167 Miles
Durango, CO to ZION NP (4 nights) 364 Miles
ZION NP to Vegas (1 night) 160 Miles
Vegas to Bakersfield (1 night) 285 Miles Bakersfield isn't someplace I'd go on vacation. Another option from Vegas is north on US95 to US 6, entering Yosemite via Lee Vining.
Bakersfield, CA to Yosemite NP (5 nights) 170 Miles Again, you need to check to see whether you can even get reservations somewhere near the park. Unless you luck out and catch a cancellation, there are no reservations available in the park this summer. They all sold out in minutes in Feb and March. Maybe Sequoia NP? Maybe Lake Tahoe? It's getting late in the year for reservations at popular places.
Yosemite NP to Santa Cruz, CA (5 nights) 184 Miles If you're wanting the coast, I'd head further north. Very crowded once you get south of SF and not much fun with an RV.
Santa Cruz to Redding, CA NP (2 nights) 285 Miles Is this so you can visit Lassen NP? If so, stay closer to the park. The interior valleys of CA can be pretty hot in the summer. Stay up in the hills among better scenery.
Redding, CA to Crater Lake NP (3 nights) 238 Miles
Crater Lake NP to Columbia River Gorge (4 nights) 246 Miles
Columbia River Gorge to Spokane (1 nights) 294 Miles
Spokane to Glacier NP (5 nights) 273 Miles
Glacier NP to Yellowstone NP (5 nights) 386 Miles Next to Yosemite, this will be the toughest reservation, so get this one next.
Yellowstone NP to Big Horn NF (1 night) 141 miles
Big Horn NF to Deadwood, SD (4 nights) 275 miles Consider staying further south in Custer State Park. Nice CG's there.
Deadwood, SD to Sioux Falls, SD (2 night) 386 miles
Sioux Falls, SD to Wisconsin Dells, WI (4 nights) 381 miles
Wisconsin Dells, WI to Cincinnati 489 Miles
