meat and potato man should read "sailing around the world by Joshua Slocum.
now that's provisioning old school!
Actually I thought he glossed over the food and house keeping issues. There was a lot we could have learned from him on that front. I realize he probably wasn't a foodie in our modern sense, but surely he craved something beyond hard tack, beans and rice. My wife is a foodie and while I was reading the Aubrey/Maturin/O'Brien series I would read to her some of the meals he describes. She, of course would gag and yell STOP!
For the passage the OP is making, they could schedule some stops along the way and provision with frozen steaks and roasts and if their refrigerator works, they could probably get two weeks and have nicely "aged" beef before they have to resort to canned stuff.