OP- you asked about transportation from Poly and CSr, have you ruled out BC? I love the BC, but have had nothing but problems with busses there. I would go with CR. Stayed at BLT this summer and the walk to MK and monorail access were amazing.
We haven't completely ruled out BC, but I've read several reports about the bus service being not so great because it shares with other Epcot resorts. Being a walk or boat ride away from 2 parks might make it worth it, though. We're still looking and resort photos and getting all the info we can. I'm a huge planner. I did find out that CSR has availability for 5 nights if we come a day earlier than we had planned, so that might be another option if we decide we need to be in separate rooms. We really loved our stay at CSR in 2011. But I am really wanting to try a Deluxe, and Wishes from the beach at Poly sounds fabulous! Guess I better wait and see the damage after we get our income taxes done this weekend.