Randy Petersen points to the Priority Club Friends and Family discount, which anyone can use. And the discount seems to be pretty good. Reservations are pre-paid and must be made by the end of May, but stays can be for up to a year from date of reservation. Points aren’t supposed to be earned on the rate, but sometimes are. Each hotel determines their own availability and how deeply to discount, some properties take as much as 40% off.
But personally I’d use the link Randy points to, because I want to be Steve Sickel’s friend. I’ve corresponded with him in the past, and he’s struck me as a pretty good guy, and I mentally thank him every time Priority Club bonus points post to my account (which is often!).