Quite often, the church sign will have the pastor's name.
Sometimes, they have multiple churches they serve in a few nearby towns.
It's easiest to ask - "Does Rev. Smith live here in Smallville?"
If she lives 30 miles away - then ask if a minister does live in Smallville.
So, the Baptist minister - Rev. Johnson - lives over on Maple Street.
So you call Rev. Johnson, instead, and ask. Don't expect.
But you will usually be pleasantly surprised by the generosity.
As for public lands - I find the purchase of National Forest maps worth it.
They show surface ownership patterns - with a scale of 1 inch = 2 miles.
So they are pretty detailed for touring and back roads, too.
They have them in paper ($5) and plastic ($10). Or thereabouts.
Even one night of pricey camping more than covers the cost of a plastic map.
Most larger towns near forests have a Forest Service office.
Plus, town libraries will often have areas maps, too.