Scottish Men Traveling Across the States - Recommendations please

Hello!

We are two Scottish friends looking to travel across the United States in an RV during August, possibly over a two week duration.

We have visited the USA twice before, but only San Fran and NYC/NJ. We are not interested in returning to the Tristate area.

We are certain we would like to commence in San Fran, then travel across to Vegas, Rachel, and Salt lake. Beyond that we are unsure which path to take and are seeking recommendations.

We like the idea of visiting Texas, and ending in DC, but we are open to ideas. We are interested in cultural experiences (particularly local food, art, and religion), and have travelled most of Europe together. We are very much open to less touristy things.

Any proposals welcome!

Slàinte Mhath!