re: Going to take a trip out west San Francisco, Yosemite, Lake Tahoe. Ideas?

I took this trip the summer before last. My only recommendation is that Yosemite takes a lot of planning, needs to be done at certain times (days of the week and seasons). Pairing San Fran and either Yosemite or Tahoe is very doable for a week, but not all three.

If it were me, I'd single out Yosemite as its own trip with a night or two in San Fran for access, and do the Tahoe/San Fran this time.