You can walk to the lake from the backyard in a couple minutes (fishing is possible in the nooks/inlets) or drive into the park for small boat rental, the playgrounds, and different walking paths. Around the lake is about a 5k trip. Our house is the little red dot at the bottom right of the image.
If you're staying at the hotel, there is an excellent taco/burrito place that you can walk to in about 10-12 minutes.
The MoCo suburbs described properly: "There’s one compelling reason to trek out to Darnestown... this “Neo-Neapolitan” pizza: the dough. It’s a chewy-crispy-puffy wonderland that goes with pretty much anything Tony Conte’s kitchen tops it with, from generous plops of fior di latte for the Margherita to roasted potatoes, onions, and rosemary."
Walkable from the house but only open M-F. Great for waiting in line. Next door to the MARC train, in case you're riding up from DC on Friday afternoon.