I also own one of those hobby farms. My simple answer is, No. At my scale, barter is pretty useless. How many vegetables will you trade me for one pig? It better be a lot because I only have 6-10 pigs to barter every year. We have a lot of hobby farms around here. But they all raise animals. Nobody is doing potatos or cabbage. I mean we all do a few onions and tomatoes. But nobody is growing enough of anything that they could trade for half a beef.
When people want half a beef, they pay cash.
The old style barter systems require scale just like the OP said. That scale no longer exists. Everybody is either too small or too big. If you are small enough that I can barter with you, you don't have enough of what I need. If you are ADP, you don't have a human who can interact with me to execute a trade and you have no interest whatsoever in my goat.
This is very much the case to a large extent, I think certain communities such as the Amish are able to maintain their farming practices because they share resources and build up labor sharing through mutual aid. They also tend to be somewhat culturally insulated and also hesitant to become dependent upon outside technology which helps them maintain the incentives to work together. But they also adopt cerain technologies on a community by community basis for instance cell phones (for business use) and small solar panel setups are common. Farming isn't really an option for a lot of rural people outside of a network like this because they don't own much land and so they just have to travel farther if they want to get a pay check.
When people want half a beef, they pay cash.
The old style barter systems require scale just like the OP said. That scale no longer exists. Everybody is either too small or too big. If you are small enough that I can barter with you, you don't have enough of what I need. If you are ADP, you don't have a human who can interact with me to execute a trade and you have no interest whatsoever in my goat.