My girlfriend and I are planning a road trip for next summer. It's going to be an estimated 4k miles, spread over about a month and a half. We will be going up the California coast, through the bottom of Oregon, through the middle of Idaho, down the west side of Wyoming, down the middle/west part of Colorado, the top of Arizona, and back to LA. The vast majority of the trip will be spent camping/hiking. This is our first time planning a road trip and would appreciate any tips/advice. Specifically we are concerned about overall cost of the trip as our budget is not exactly the biggest.