After about half an hours of fighting them, we surrendered and decided to pack up and leave for the mini-playground nearby. Our son's eye immediately brightens up when he saw the slides that were attached to the playground.
After allowing our son to indulge in sliding down almost 20 times over, we left the place in a hurry as it was going to rain soon.
May visit the Upper Pierce Reservior next time, no promise.
-SGMale