Lovely trip report. You have a beautiful family...you all look very happy in the photos (except the last one...haha).
On a sidenote, I've never stayed onsite before (I'm 21 and don't plan my own WDW trip yet...I've just gone with my mom)...but your trip report made me want to! I've read many threads about the benefits of staying on site, but none of them really clicked before b/c it was mostly mom's and dad's saying how nice it was to take their tots back to the hotel for a nap.
Well, your kids aren't that little, and it sure sounded nice to take all those naps and go swimming during the day! If I can ever afford the Poly in my lifetime...I'd like to try it! Thanks for the report!