Stan,
The great circle from your neck o the woods to Tahoe takes you over Cheyenne, so as the others have said, the I-80 route is a good choice. That keeps you north of the higher Colorado Rockies and the Uintas and Wasatch in northern Utah. Oshkosh, NE is a good (cheap) fuel stop on the east side of the Rockies, and Logan or Brigham City, UT or Malad City or Preston, ID are good pit stops on the west side of that crossing, and there are good bail-into spots along 80 in Wyoming. Lots of RVers at Ogden too, if you need assistance in that area. West of Utah, I typically stay N of the restricted airspace (Dugway Proving Grounds, etc), and then head for Reno. This is how we planned and flew the RV-1, and the terrain is an easy cross along that path. Even in my plane, with O2, I typically stay N or S of the meat of the "14ers" in central CO. Just one technique. AM flying over the rocks is my MO too, FWIW.
Have fun, and when in Tahoe, holler over to us at Stead, or come for a visit, if it's not during the race TFR. And if your there during the races, come find the 7 RVers in the races this year! (Sport Class Hangar).
Safe trip...shout if you have any Q's enroute or while here!
Cheers,
Bob