"Preparedness, when properly pursued, is a way of life, not a sudden, spectacular program."-- Spencer W. Kimball
If the grid goes down, no gas, no water, trucks stop, people starve. Farmers can't farm, crops wither from no irrigation, livestock dies. It makes Argentina & Bosnia look like a vacation spot. The best alternative is to leave the country. Otherwise, hunker down for a few of months and try to be as invisible as you can.
Sure, you might be able to get out of the country, but to where? There's a good chance that everyone else, while they may still have a functioning grid, will be in complete economic upheaval as well...and along with that, a very good chance that their borders are closed.
I'd rather become a hunter - gatherer until things work out