CA to Yellowstone - How much time?

[ffmedic]

Happy Holidays Trippers!
Newby here planning our first roadtrip this summer. We are a family of 4 with two kids 7 & 9 (brother & sister). We are planning on renting a 22' class C.
I was hoping I could get first, your advise on how long this trip might take, and secondly, good routes.

We would like to go from Santa Cruz (home) to Boulder, Co (Brother's home). We are planning on leaving in mid June. Along the way, we would like to see the Grand Canyon, Yellowstone as MUSTS, and are looking at a few other locales. Here is the route I have looked at via Google Maps, but have NO idea how long this should take and I am thinking about 2 to 3 weeks?

Santa Cruz to Bodie (killer ghost town)
Bodie to Death Valley to Las Vegas (stay 1 day)
Las Vegas to Sedona,Az
Sedona to Grand Canyon/Zion (stay 2 days)
GC/Zion to Boulder (stops at Bryce, Arches...? (stay 2-3 days)
Boulder to Cody,Wy (stay 1 day)
Cody to Yellowstone (stay 2-3 days)
Yellowstone to Santa Cruz (route back & how long TBD)

Could I do this comfortably in 2 weeks?

Thanks for any help!