We're here now and I think it depends on how much cold you are used to.
It got to 72 today and my DH and I couldn't believe how bundled up so many people were today. We even talked about it with some other Northerns while standing in line for the bus back to CSR. People in long pants, winter coats and scarves while we were in shorts, capris, polo shirts, 3-quarter sleeve t-shirts, and short sleeved princess dresses.
But it was very breezy and cloudy by the time we headed back to the resort around 6. After some naps, we will be layering up and bundling up for EMH tonight until 3 at the MK because we got very chilly last night leaving DD around 9:30.
So, definitely some long pants and sweaters/sweat shirts and even jackets if you get cold easily.