In PA I would look into Ivanhoe and Tim Bamboo they are in town and the kids will enjoy feeling like they can walk around a bit. Fern Hill is another option they are renovating but still open for business....you can't walk to town but can walk to San San beach and the property has three pools.

another option with a pool that comes to mind is Mischur outside of town it's a villa and has a play set and a pool and they have rooms with several beds in one room

you can take day trips to boston jerk, frenchman cove and reich falls