Tex,
I'm hoping to do it in 15.5 days as well. We have 6 travellers, and 4 who could drive. We like road time, and the scenery should be outstanding. My son WANTS to hit Cedar Point OH, by CLV, as well as Chicago Cubs. It's his senior trip... then the rest.

OPEN question to anyone: I last pop-up camped in the 70's, so how long is set-up? We'd prolly rent one...

As I said, this is to be a survey, just hitting hi-lites. We won't be going on any Grand Canyon tours, much as I'd love to.
Since we're all adult size, I don't see us doing hotel rental, tohugh that's what we did for his siblings' trips. For his brother's, we surveyed CA, and hit all 5 MLB teams in CA...

Does it seem doable?

THX,
PB

P.S. We loved our time in TX: DFW, Hou/Galveston.,and the Alamo...