Some areas have the Bookmobile, some have that and the Grocery truck, I guess.
We have Schwann's Food trucks that come through. The smart drivers stop where they know we are gathered for school activities, work events, etc. and we all load up. Much easier than driving from remote place to remote place and hoping to catch someone at home. We also have a gentleman in the area that gets seafood and specialty cuts of beef (even though most of us raise good beef). He also lets us know when he has a shipment and what is available. We go to him, or pass the word around and let him know where a group will be and he meets us.
Most of us carry coolers in our vehicles to keep things cold on the way back from town, so buying from these folks when we see them isn't a problem.