We went over to Lake Needwood on the way to the dump/recycling station in Gaithersburg yesterday afternoon. IIRC it was picnic area 3, we turned right at the T intersection in the park (there are I think 3 picnic areas, 2 to the left and one to the right.). There iis a large
habitrail for humans playground area behind a parking lot that is visible from the road. Proceeding around the loop we saw the picnic shelters and explored. There are paths down to the play ground which is within child's shrieking distance but not too close. These same paths can be used to get to the picnic if one parks on the lot as opposed to the parking on the loop road.
The shelters that looked nicest to us were in order of preference: P, Q, R and O. We were judging on convenience to road, grill size, tables and set up. Nearby and down the slope slightly is a water fountain in front of a restroom building with shelter N below that. P is nearest the road. R and Q are up at the top of the small hill, nicely situated, one (R?) seemed to have a smaller grill. O is across from P and has a stone wall on one end, but the grill didn't look in as good shape.
The shelters are all in very tree-d places so they're shady. The lake is across the loop road and down a slope, so with luck there won't be any impromptu or accidental aquatics. The children loved it, particularly as someone previously had been gathering up fallen branches and had built a sort of wigwam in the woods. They also approved of the playground.
I hope this is some help. We drove past the other areas, but only tramped over the one set.