[mandco]

I tend to get my lot things that we will need/be getting for the holiday anyway
some of these are more actual presents than stocking fillers but things I've done previously include

earphones/buds for the plane
sunglasses
notebook/pen
lanyard
trading pins
powerbank
playing cards/ travel games
make up vouchers for activities you are doing - mickey & minnie invite you to have dinner at chef mickey for example
dollars
disney themed clothes/hat/socks
backpack/cabin bag
hand held fan
mini lego sets
travel sized toiletries
activity/puzzle books for on the plane - you can get mini ones