Food Truck Event in Hagerstown MD. The Krab Joint will be at Upper Stem Brewery from 3pm to 8pm. Stop out and enjoy a local craft beer and some food such as Boil Tray, Box, or Bag. Crab Egg Rolls, Cajun Shrimp Box, Crab Balls, Shrimp Pó Boy, or Crab Cake Sandwich.