My son wants to try growing potatoes next year for our farmers market. He likes to dig in the dirt--I don't! He has a few types picked out but would like to try a fingerling type, which I am not familiar with. What is a good, dependable variety that he can try? Also, are there companies that are better for potatoes than others? A fellow marketer told me not to order out of the seed catalogs, because the seed potatoes look more like potato chips. Not sure where else to get fingerling seed though.