I think an idea Gark society would be an island some where, far enough not to be visited often but close enough to sell their crops to a larger society. And every now and then recruiters leave the island to "hire farm workers" to help with the harvest, offering very good wages. And of course they only hire vagrants, beggars , and other that will not be missed.
and as for the mine. You have a small family run mine that seems to be doing very good. although only 8 family members work the mine their output is twice that of similar family run mines in the area. And to help make a few extra coins the family also runs a small in for travellers. Of course a few travellers seem to disappear every now and then , mostly itinerant peddlers and vagabonds nobody pays attention to. Funny how the menfolk there seem a little out of shape to be doing twice the work of their neighboring miners. Whats their secret?