Adam,
We have traveled the route from Dallas that mostly follows I-35E to Rte 360 to Rte 287 from Denton?Dallas to and thru Amarillo with a short jog onto I-40 then back on Rte 287 north pasing into and from the panhandle of OK, into Colorado thru and passed Lamar and up to I-70 at Limon, Co.
Taking I-70 west to I-270 to I-25 to Cheyenne will get you to I-80.
Taking I-80 west to I-84 bypasses the Salt Lake area.
You will take 84 all the way into Oregon, say Pendleton and Portland where you can get I-5 and head to your destination.
If times and days match, feel free to stop over in our driveway at the office. We have 50 amp and water, and its a short five mile trip back to I-25 and Cheyenne which is 99 miles from our house.
Taking I-70 would really take you out of your way getting to Salt Lake, even if you took the diagonal thru Price Utah and beyond.
Good luck.
Jim and Chris
2001 Featherlite Vogue XLV 2 slide with Rivets-current coach, 1999 shell
Previous 22 years,
We have owned every kind of Prevost shell but an H3-40