Hey Phoenix,
Worm and bobber
is just the right ticket. On the Maryland side Lake Artemesia in College Park, Maryland or just down the road Greenbelt Lake in Greenbelt. There are Bluegills and Bass in both lakes ( what you're actually just large ponds ) also both lake are usually stocked with trout in the spring and you're still should be some in both of the lakes. There lots of easy Shoreline access on both lakes as well. No matter where you wind up going make sure thoroughly check your kids for ticks afterwards.
Maybe Lake Burke on the Virginia side
Vladimir ( Vo )