Originally Posted by
knit-in
Would it be better to drive to the US border from San Diego or are we better off taking a taxi or (luggage permitting) other public transportation?
IMHO you'd be happier to find your car waiting for you after you cross the border. Especially with family. It's not too expensive to park right there.
Also, will Global Entry work on the US border on the return to expedite the crossing?
Yes, but there's no scanner. You just hand your card to the officer who will quickly welcome you in. There is a special line so don't wait in the long line.