How about registering your "garage coordinates" with your car's computer so that it can detect when you're on a road trip and give you the option of installing an update or not? (When you are stopped and have parked the car, of course.)
Exactly. In the same way my computer remembers which monitor I plug into it (work, home office one, home office two, etc) and recalls the configuration of the second screen... the car should know when it is plugged into your home charge port. Various features should only be available when plugged into your home charge port.
You don't really take Teslas for roadtrips(at the moment - when the supercharger network gets finished...maybe)