It's not that far to fully serviced geographies and if the roads were good enough to get in, they're good enough to get out and getting better every day. I don't think it's that implausible that someone could hole up on their boat for a couple of days, get an order placed for delivery to a...
So glad to hear you and your boat got through it all. I'd assume, roughly, about 30-50% of your normal motoring fuel economy. If you normally burn 1 gal/hr underway, plan on 0.3-0.5 gal/hr just to charge the batteries. If you charge for an hour a day, you can estimate how many days you'll get...