I have a day hike permit for 7/20 and would like to get some guidance and comments to my acclimatization and trip plan as laid out below. I am coming from San Francisco

Plan A
7/18: Leave SF at 5am, drive through Yosemite, spend sometime seeing Big Bear Lakes and use that opportunity to spend time at high elevation. Get to Whitney Portal Campground in evening, spend the night.
7/19: Spend time at Whitney Portal, get permits, do some small hikes around.
7/20: The big day, leave campsite at 2am.

Plan B
7/17: Leave SF at 7pm and drive to sleep at Tioga Lakes or Touloume meadow in Yosimite (that is 8k-9k ft)
7/18: Go see big bear lakes, do some hikes, sight seeing at also high elevation. Get to Whitney Portal campground in evening and spend the night.
7/19: Get permits, spend time hiking in the whitney portal area.
7/20: The big day, leave campsite at 2am.

Ofcourse, plan B would be better, but do you think Plan A is enough?