We stayed at the WLVillas when our son was 17 months and the BW Villas when he was 19 months. We are heading back to BW Villas in October with our DS who is now 4 and our baby who will be 9 months (also a boy). I don't know of any kit you can request for babyproofing. We brought our own outlet covers, etc.
I'm not sure how ornery (sp?) your son is, but our son had a blast turning the lights and jacuzzi tub on and off (he could reach the knobs and switches) and pressing the buttons on the phones (there are two in the room...one in the bedroom and one in the living room)! Also, there is a VCR in the room, so you can bring any favorite movies from home or rent them.
You will LOVE the villa accomodations!!!
Have a great trip!