The 2003 blackout was extremely widespread and lasted 2-3 days in some places. Same with post-Sandy blackouts. It wasn’t just lower Manhattan; a lot of NJ and Long Island was out for 7-10 DAYS.

Problem with the farmhouse idea is getting there if you’re not there when TSHTF. Sailboat or an ultra-light aircraft might work if the place is in coastal (i.e. 5-20 miles inland, not right on the coast) Maine, I guess.

Car or motorcycle is too likely to be stolen at gunpoint or worse. Not to mention fuel, though old diesels are often able to run on a combination of yak excrement and nose grease.