Kristen over at Couponing to Disney has a pretty great list of items you can get at Target and Walmart for FREE or under $1! Prices vary A LOT from store to store, so this list is guide. I wouldn’t suggest making a special trip but if you are going anyways, you might as well take some extra coupons with you and see if you can get some deals!
Most of these are based on travel size items or reduced prices, which is why I say you may or may not be able to get these deals.
Thanks, Couponing to Disney!