My mom, sister, and I went on a full on nature trip. We flew out from Dallas to Denver, rented a car, & basically just started driving. I didn't really set out all the when/where's—all I had was a list of places I know I wanted us to visit, and winged it really. We'd drive, hit as many stops as we could and once we got tired, we'd just find a nearby hotel, sleep, and the do same thing the next day. It was amazing.