Was at MK yesterday, temps in the low 60's. I wore capris, kids wore light weight pants. We all had on t's and a sweatshirt or sweater. We took the sweatshirts off for a couple hours in the afternoon when the sun decided to make an appearance, but otherwise wore them all day. When the sun went down we were a little chilly, but did stay for Wishes. I am from the North and thought I would be warm enough in shorts this week (visiting relatives), that was so not the case. Glad I brought some pants. Wish I brought more than 1 sweater. It did the trick, but I am sick of wearing it day in and day out.
LOL Unfortunately, I think you need to pack a little of everything. (except tank tops, can't imagine needing those)