Pins and pockets are a must
If you leave your hair down, pack an extra hair tie
If you usually wear your hair up, pack an extra hair tie
Money, of course
Probably a lot of it
Some little form of carrying tote for memorabilia– fast passes, receipts, whatever your nostalgic muses demand
A change of clothes or a poncho, or maybe both
Extra socks… and maybe extra shoes, too
Even if you forget all this, remember
It’s most important to pack your patience