Wow, sounds like a long slow trip. When you do arrive, make sure the RV can be parked at the resort, and enjoy the room servic, maid service and large bathrooms and big rooms. Consider Mandalay, MGM and Ballys
I would choose the Toyota ... with serviceable "winter'' tires installed ... Drive the I-5 to Eugene OR. IF, there is not, a active storm ... Drive the 58 East. to the 97 into K Falls. From there, the 39/139/395 will take one into Reno... Follow the 50 to the 95 South, to 'Vegas Happy trails ... carracar
We have BCAA. Even have the xtra RV BCAA. I'll go see what they can offer as far as trip advice. Thx.