Frank, I attended the last meeting of the year for the Potomac/Patuxent
TU in May. They had a speaker on fishing the Potomac- slide show etc.
He's a guide. Looks like a promising proposition. One of his main
points was- "we live in a warm water state, we should thing warm water
fish. Trout are fun to catch but....".
Try http://www.mkfs.com/

Your ponton, my kayak, let's do it....

Hope this helps.