Resort at Squaw Creek I80 get off at 89 to Tahoe City. Its right by Squaw Valley, 4 star hotel, you can golf or hiking around squaw valley, go to Tahoe City for lunch or dinner or biking to there. on your way back drive around lake tahoe and take high way 50 then 80 back to the bay area. Plan 3 days is enough.
Take a look at side of your garage door. From inside, usually there's a manual Slide Latch like this: http://www.ebay.com/itm/Garage-Door-Slide-Latch-Includes-Fasten Certainly, the slide latch can only be used to lock/unlock garage door from inside and manually. You can use it to lock garage door from inside when you wait for the backup battery.