Sorry, just seeing this now, don't know if it's too late to still be helpful. Adduming your end goal is SF, options would be:
Goblin Valley (SF will love this) + adjacent slot canyon
Valley of Fire SP + Hoover Dam + Great Basin
Mono Lake toofas + Bodie ghost town (SF will love it!)
Redwoods NP (go find tallest tree in the world Hyperion = absolutelyepic, though not RV friendly) + Lake Tahoe or Lassen NP
Pinnacles NP
Kings Canyon and Sequoia (but check roads if high passes are snowed in)
Bonneville Salt Flats
Capitol Reef NP
California coast
Hatzlacha! Feel free to call/text/WA for tips on any of the above