We have 4 days from San Fran to Vancouver, so see no problem. It is always a bit of a juggling act to keep our lot all happy. I would spend it hiking the whole time, but my wife and kids would leave me in one of those parks. They would shop the whole time and leave me broke. We are finalising our schedule. Arrive on the 20th in LA, drive to LV on the 23rd for show alowing only 1 day 1 night there, then drive to Zion NP, probably Springdale and spend 2 days 2 nights. Drive to San Fran and maybe stop at Yosemite, Sequoia. Stay there for New years eve and day and maybe one more day. Drive to Seattle stopping at a couple of parks/towns. Arrive at Vancouver on the 6th. Happy to listen to all tips.