RV trip : SF - Las Vegas - Salt Lake City - Denver?

[Larsvanheterve]

Hello fellow RTA users

I am currently planning a visit (from Denmark) to the US next Summer and stumbled across this great forum in my thirst and search for knowledge and advice. I hope you can assist me with some valuable information and inspiration to the following trip. I have read through various of the current posts already here, but haven't really found answers to all my questions.

We are 2 adults and 3 children (2,5,8) and are planning the following route in an RV (we have previously travelled in both Canada and Australia in an RV so this is not foreign to us):
SF - Monterey - San Simeon - Yosemity - Kings Canyon - Sequioa - Las Vegas - Grand Canyon - Zion - Bryce - Sal Lake - Jackson - Yellowstone - Cody - Badlands - Mount Rushmore - Hot Springs - Cheyenne - Denver.

We have approx. 5 weeks (max. 40 days). My questions goes: Is it too much for the time available? Or does it sound reasonable. If reasonable, could I ask for some suggestions as to time to spend in some of (not all) the various NPs?

If the route & time-to-spend seems... well, optimistic... what should not me missed? I appreciate that route suggestions are difficult to give as it depends very much on taste and preferences, but any input would be valuable nonetheless.

Final remark; we do not neccessarily need to end in Denver; could also be Rapid City so safe the last leg to Denver. we just opted for Denver as Apollo RV has a drop-off outlet there (Apollo's RVs seem to be preferable to CruiseAmerica's...).