The west seems to be where most people think of a driving adventure. To me the answer comes down to this. Yeah...you can drive anywhere, but, the true reward comes with how willing you are to leave that RV and do America. Don't choose one destination. If you're mobile,do as much as you can. I've seen several National Parks and have come to this conclusion. No one is better than any other. They're all great. Big Bend in Texas is the least visited of all the parks but, it's one of my favorites. It's also the darkest. So, if you want to see more stars than you can emotionaly handle, go there. If you have money go further...that's what money is for. Peace.