If you are in shape AND you will NOT have a head wind, I would recommend you do the Blythe to Brawley section in one day over staying at the biker lodging. While the lady was nice, the 1.5m road to/from her house was a huge pain with regular road tires as the road was incredibly sandy.
The reason we did the hotels only on this trip is that the budget hotels were only about $10-$15 typically over a commercial campsite and a few of the riders were in their mid-70s and wanted a bed if possible. Who am I to argue with that ! You could always mail your gear to a post office (care of general delivery) or motel near the start of a long "hotel desert" and mail it back home/ahead again when you reach "civilization". Another option is to just go way off route like I did such as doing the Gulf Coast from Florida to Galveston (gap between Galveston and Phoenix is a future trip).
Finally, AND are strong, I highly recommend going off route between Marathon and Marfa and visit Big Bend National Park and then west via US385>TX118>CR170>>US67. This route is much much hillier but 4x more scenic. You can get indoor lodging but have to book in advance which is always a pain to ensure you get there a the right time.