In St. Mary's county, the ones that I know of are at:
Dennis Point Marina (Drayden)
Colton's Point Marina (7th Ditrict)
Fitzie's Marina (Leonardtown)
Unless the pump is clearly marked as ETHANOL-FREE, ALL pump gas; regular, mid-grade and high test, will have ethanol in it.
Ever since I started using ethanol-free in my yard stuff, have had no problems. You asked what people are doing..... As long as there is an ethanol mandate established by congress, We're stuck with it. We're subsidizing the big corporation farming companies. Next time you see the commercial on TV about the ethanol mandate, pay attention. It directly affects your pocket in many ways. The green folks started this, then figured out it wasn't the panacea they thought it was. Now we're stuck with it. There's people out there trying to get the E15 mandated. More corn sold to be burned in our cars = more money for them. They don want you to find out that E15 will damage your small engines and marine outboards, and voids warranties. Not their problem.
You'll notice when you start burning ethanol-free gas in your small engines that they will run much better, start easier, and certainly wont get gummed up as fast . Your gas will last longer than two months. Ethanol gas is good for nothing. a failed experiment.... unless you are on the receiving end of the money...