I have visited most of those places mentioned here in my travels over the years.
Don't really have the urge to spend a bunch of monies to pull my RV into those areas at all... RV 'traveling' is not my cup of tea so it seems...
We do almost all of our RV 'camping' around our local state and up and down the Blue Ridge Parkway... The Smoky Mtns in TN/NC is considered a long trip for us haha...
I just can't think of any good reason to travel 12-days on the road in a 2-week vacation just to spend a couple of days at somewhere like Yellowstone NP... We can wake up a bunch of mornings creekside watching the fish jump around here within 2-3 hundred miles of home base and only have maybe one day of RV travel all considered..
It all depends what you all want to do and can afford I guess...
Roy Ken