Thanksgiving is our favorite time to go! We'll be there again this year! One year it had gotten down to freezing the night before we showed up. It was cool on our arrival day but then it quickly warmed up for the rest of our vacation. Be prepared for high 70's/ low 80's most days. But be ready for cold just in case!!!
We usually start our day in shorts, t-shirt, long sleeve shirt and a hoodie. The hoodie is off and wrapped around our waist by 10am. The long sleeve shirt usually ends up in the backpack for most of the afternoon but it comes back out when the sun goes down. And the hoodie comes out later in the evening. We always pack (per person) a cheap pair of gloves, a thick undershirt (my boys like the nike and under armour brands), a pair of jeans and a warm hat. In 2014 we needed the hats and gloves for a couple of nighttime shows.
Check the weather a day or two before you go and throw in an extra pair of jeans if it looks like it will unusually cold!