i guess it depends on what age children you have. i wouldnt feel comfortable with my kids in a lake
They won't be swimming in the lake (at least it's unofficially allowed). The house comes with a 4 person pedal boat and 2 kayaks, and I can rent more. There's a little dock to fish off of (and cheap gear for rent there as well). I think for me though it's more about the setting. The house has a massive deck spanning the side facing the lake. It also happens to face west, which means sunset over the lake.
Personally, swimming in a small round pool like that is no מעלה. For the kids, all but one are young enough that we're comfortable sending them to the community pool, with the women watching them. If it turns out to be empty, the men might come as well. Plus, we can beg/borrow for pools near home often enough, and the kids swim in camp. I'm not going to the Poconos primarily for the swimming.