Hey Don!
Go ahead and book at OKW and SSR and stay on the waitlist. If it comes up, they will automatically make the change for you.
FWIW, everyone always tells me that we will never get our waitlist (due to time of year or whatever the issue) and we have always gotten it. Sometimes we go right down to the wire and it comes through just a day or two before we leave, but we do get it. But again, reserve SOMETHING now so you won't be homeless. Then you can always be pleasantly surprised if/when your waitlist comes through.