Advice ping!
That seems like a lot of ground to cover in 12 days. You should probably take more time or make the trip shorter.
Hi rabs....sounds like a wonderful trip! I’ve never traveled West, but have taken many long road trips south, alone. My only suggestion would be to consider weather and the distances between places where you can get gas, especially in the mountains or other areas where cell phone service is not available, leaving you totally dependent on strangers. Nothing worse than getting stuck and not being able to call for assistance. As I tell my sons, have fun, be safe!