Okay, I'm back and have lots to report. I will give more info later but here's the highlights
Typhoon Lagoon-Yes you can use DDP! Leaning Palms, Typhoon Tillys and Typhoon Tillys Snacks. (we used a SC for the special flavored waffle cone at TT Snacks and it was really good-got the caramel/choc. flavoring). Not all kiosks can take DDP or KTTW cards.
Blizzard Beach-Yes you can use DDP! Lottawatta Lodge, Avalunch, Snowballs, and a few more locations. Not all kiosks can take DDP or KTTW cards.
Many of the stores have one location where they have all the snack options. I asked in several locations and was directed to them.
POP food court has a sign centrally located that tells you what you can use a SC for as well as what is a dessert option.
Everything POP has a list at the register of all items considered a SC. You could get the larger lollipops at Everything POP as well as
Goofy's Candy Co. but not at the stores at GF or Poly. (I asked and the cashier couldn't get it to go through) We picked up 7 lg. lollipops at Goofy's at DTD on our way to MCO.
Another inconsistency was the bag of candy corn. I was told at
Merchant of Venus that you could get it with SC but told no at GF and Goofy's.
Some locations said you could use SC on anything, single serving, under $4. I was told at
Candy Cauldron at DTD that the limit was $4.50 (can get any item in case-fudge, chocolates, etc.) or caramel and candy apples except for specialty ones. (can get candy, caramel, and caramel and nuts)
I have photos of many menu boards and will post them as soon as I get a change to transfer them. I wanted to post about the waterparks right away for those going soon.
Arrived home last night at 10:30 p.m. pst( 1:30 a.m. est

) Gotta unpack now.