Plan your route roughly before you leave, and buy county maps from gas stations as you go along.
Maybe in China Yan, but not likely in US. Usually available at courthouses.
A Brit said in another forum: "Need an overglove? Just pick up one for free at the petrol station, the ones they have for use when you're pumping gas to keep it off your hands." Maybe there, but I've never seen them in the US.