WDW.
My Dad went the first day, and got one. But between my husband & me, my Dad and a friend we need 3. So still 2 more to go.
While the number is unknown, it's "thousands" and they are handing out "hundreds" of wristbands per day. Last year is was 200, but someone heard yesterday they sold 400. Point is, you should be able to get one on Saturday, and I think into next week at least.
Wristbands, so far, have been handed out at 1PM. The patio bar opens at 3:30 and you can get your drink. Inside opens at 4:00 and then you can pick up the mug itself. But once you have a wristband you can come back anytime until bar closing. So you could theoretically get a wrist band and then head to the MK for a few hours, or monorail hop.
Disneyland will probably start selling theirs next week. But construction at Tangaroa Terrace is affecting their "process."