Whispering Canyon is great fun - you'll enjoy it. Since WL is on the list - FYI they offer free tours of the resort that leave from the lobby several times daily. If you call the Front desk ahead of time you could plan to take the ferry over from the MK in time to catch one.
We did it several years ago, they took us up onto the roof for a birds eye view of th MK and to the smoke house in back for a free sample of beef. You get a bunch of interesting tid bits like " all the large beams used in the lobby were rescued and recycled from the Mt St. Hellens erruption path" and so on. If the timing works out for you I would put it on the list, but do not make 2 trips.
Have fun.