From: Not the Karl Orff

If starting from SFO, I
d say at least 1 1/2 days to drive to Yosemite.

You say SFO but did you mean Salt Lake City (SLC)? (Or Yellowstone instead of
Yosemite?)

It's only 4 hours or so from SFO to Yosemite ...

How long do you have? That's a lot of driving.

That's what I was thinking ... I'd want three weeks for a trip like he proposes