Never went into Sam's Club...if you like to shop it is an experience...
Everything is sold in bulk, sort of, or large sizes, but then there are sigle things also. I know what our club is like and have been in a few others that are pretty much the same. A lot of people complain about the size/quantity you have to purchase but there are only 2 of us and I do a lot of shopping there. The prices are good on some things great on others, really bad on some...a comparison shoppers dream come true. As for what they have...fresh produce, dairy, bakery items, meats, motor oil, shampoo, laundry detergent, fozen food, books, film, car tires and batteries...a little bit of everything. If you have a lot of freezer space it is great...divide and freeze! you do need a little extra storage space, bulk TP takes up some space...or just buy one large size shampoo instead of 3 or 4 smalls over the next year... It really does work, after all you wont do all your shopping there.
I am pretty sure the club still offers a "trail membership" one day pass to check things out. I would check it out. We belong thru a business so it is cheaper than a sigle membership but from what I remember the single membership is not outrageous.
They also have a monthy rebate program...it's been hit or miss on good or bad.
As for WDW...I think there is a Sam's in Orlando, I think I was there once (ok I have a shopping problem...but I can deal with it!!!) For my next trip...I watched a collapsable cooler come down in price from $24.99 to $9.99 (some on this board found it even cheaper), I will
buy the baby cereal boxes, nephew eats cereal as breakfast and snack, Grab a package of their fresh made muffins, freeze and go, my film (on a rebate), disposable cameras for the nephew, and a book for the plane.
Got anymore discount shopping questions...ask, I can "smell a good store" from about 5 miles!!!