Cash, or access to cash.
No joke. Seriously, I'm not kidding. You never know if you need to make an emergency repair, or buy something (or, the van breaks down and you need to buy a greyhound ticket home).
No joke. Seriously, I'm not kidding. You never know if you need to make an emergency repair, or buy something (or, the van breaks down and you need to buy a greyhound ticket home).