[dgammon6]

Our last trip in our RV before we sold it was out West for 3 1/2 months an awesome trip we will never forget. I would advise having a tow vehicle to get around. It's nice to find a park and spend a few days there and use your car to explore the area. A tow dolly is best suited if you plan to rent an RV. You would need a front wheel drive auto. I agree with the above posts, taking a couple of short trips will help you get familiar with the operations of the RV and will pay off with a great trip.
Have fun, you'll find we live in a magnificent country.