Here are fishing reports and information for the Potomac River region around Colonial Beach. The waters are Maryland property, so you'll see information here for the Southern Maryland area too. They're located right across the river from us, after all.
from http://journalpress.com/colonial-beach/beach-news/4041-outdoor-report-october-15-2014 Potomac River: Donna at Ken’s Tackle reported the rockfish bite has been quite good on topwater on the Maryland side. Some anglers are finding big chartreuse-colored crankbaits are the best lures to use. Bass are hitting over the grass mats on crayfish-colored plastics and cranks.
Inland waters: Ponds are turning on for crappie and bass. The fall bite is starting to pick up. A few more straight cool nights ought to ramp up the crappie bite.
The area around the Morgantown Power Plant, near the Route 301 Harry W. Nice Bridge is listed as a fishing hot spot on the Maryland Department of Natural Resources website. http://www.dnr.state.md.us/fisheries/fishingreport/hot_spots.asp