Personally I love the views over Bay Lake.
North wing is nearest to MK, some of the rooms on the outer side of the curve right at the end have views of both MK and Bay Lake.
At the end of the South wing you could have views of the Marina.
5th floor is the Sky Bridge connecting to the Contemporary. There are two elevator banks, and both have areas where you can watch fireworks from.
The Community Hall is worth checking out if you have kids and want some quieter / craft time.
There are grills down on the beach area, you’ll need charcoal but you can hire cooking utensils - I think from the Community Hall (it was when we did it).
Movies and campfire are in the garden between BLT and the Contemporary.
The store at Contemporary is well stocked with food and doesn’t seem to run out (unlike Old Key West that never seemed to have butter in the afternoon).
And enjoy the walkway to MK and your own security checkpoint!