OP, last March one of the women on the ladies trip could only find the Dollars at ONE location in DCA, the giftshop at the front of the park. That's where I found them, too, but it took some heavy convincing to get the CM to look for them. She wanted to just tell me she knew nothing about them, but when I urged her to look, she found them under her cash drawer in the register (obvious place to look, don't know why she supposedly didn't know they were there).
I haven't looked for them in DL, but maybe they are easier to find on that side. Just be aware that, at least in DCA, you might be in for difficulties.
I used them for cash, but now that my wamu account is Chase, and the ATMs at the parks are Chase, I just get cash from the ATMs instead of DDs.