Jeff,
You are right, the Potomac is pretty small here. Still, a lot of people seem to be using it and there are a lot of marinas, all at quite a cost. We drove over to look at the marina in Deale, MD over on the Chesapeake. It is very nice and quite a bit cheaper, but it's about a 90-minute drive. I have been able to spend over a month on board, in two-week chunks, this winter, and I can really use a break from the cold.
The real solution is to get another M to keep up here, then we will have all options. I think I'll ask Liz and see what she says....
1975 32' Flybridge Sedan, twin Perkins 6-354 diesels, 1:1.53 velvetdrives, 16 X 19 props. Merritt Island, Florida