familygal:
ok, onsite is out of the question, ONLY if you NEED to smoke in your room or right outside.
hubby, Nebo, at home, smokes EVERY WAKING MOMENT, really. but HE LOVES to stay onsite. when they instituted the new "no smoking rooms" I wondered how he would deal with it. (I smoke, also, but it's not as important to me).
well we have stayed onsite 4 times since then. yeah, it's a bit of a hassle to walk to a DSA, but in our opinion, not as much of a hassle as staying offsite. (you don't get the transportation, the extra magic hours, etc.) we always request close to a DSA, and they try their best to honor it. now, we have not stayed at a deluxe resort since then. at the mods and values, it's pretty easy to walk out of your room and to a DSA (as I imagine at a deluxe, where you have to walk down a LONG hallway, go down the elevator, then through another hallway to get outside)
also, I have heard conflicting stories about the Dolphin. the Swan is def. nonsmoking, but I think they MIGHT still have smoking rooms at the Dolphin, not sure. still onsite, but not Disney owned. we LOVED it. you still get the transportation and extra magic hours benefits, but not chargng privieldges or Magical Express form the airport. (also, you can't get the dining plan).
but!! you can watch illuminations from the bridge between United Kingdom and France, and walk down the International Gateway and be back at your resort in 10-15 minutes!!!

(just in time for Karaokee at the Swan!)
have fun, whatever you choose to do! (I feel your angst) but try not to let it ruin your fun!