Crabs are "in season" from May to about September, depending on how warm the summer's been. You can always get crabcakes, but depending where you go you may end up with more filler than crab. That's why I suggested G&M. You get a baseball-sized crabcake with almost NO filler. As someone born and raised in Maryland all my life, it's a GREAT crabcake. The problem is it's not a chain, so the only one is over near Baltimore (G&M Restaurant). Phillips isn't bad, neither is Legal - and there are locations near DC - but G&M is better.

Come back in summer - there's nothing like sitting on a deck somewhere with a pile of steamed crabs doused in Old Bay in front of you. *drooling*