What do you think about staying on a boat off the Jersey coast. That would give you the flexibility to move around off shore. Stock it with fresh water, and dried meats.
Depending on the size of the boat, that could hold you for a week or two, perhaps more. You're going to have to land sometime, though...and if the collapse happens during hurricane season, you might be in for a bumpy ride.
If you already have such a boat, it would be foolish not to use it as a resource in your disaster planning, but if you haven't bought it yet the funds might be better spent on an actual retreat.