2 Ozzy tourists on the loose

Also, I notice you say you are doing this in March. In March the weather in the Southwest region of the Country will likely be perfect for travel. But March is the tail end of winter so if you start getting up toward Denver and areas north, you may find yourself with winter weather still and snow. I would never take an RV to snow country on purpose myself.

So back to my advice, now noticing you are traveling in March, I'd do the southwest. Hit Vegas, grand canyon, painted desert, New Mexico, Arizona, and that region.