The plan is to fly into Denver in mid-October, rent an RV and head to Yellowstone for around 3 days, then south via Salt Lake city and Canyonlands to the Grand Canyon. (Or maybe straight to Vegas then out to the GC, missing out on Canyonlands, if we don't have enough time.) Then from Vegas to LA (if we have time would like to go via Death Valley, Yosemite and San Francisco) flying back to Australia on November 6th i.e. 3 weeks to make the trip. We would just be hitting the major attractions and not spending much time at each - probably just one or two nights. Questions for the forum: a)Is this at all realistic? b)Will the roads be accessible? Are we likely to hit bad weather? c)Is an RV a good option or would we be better with a car and motels? What is the RV "camping" like in the NPs and how far ahead would we need to book? NB. We are complete RV novices and have never visited the Western United States before.