If you check on betterbidding.com there are hotel lists for both Hotwire and Priceline which identify what hotels participate in each of these bidding zones. These lists change from time to time as hotels that previously did not use Hotwire or Priceline would begin to use one of these discounters to sell its hotel rooms. Also, Priceline recently split its WDW Zone into two zones (Downtown/Lake Buena Vista and Main Gate/Celebration), so that the Priceline zones for these two zones is now very similar to the Hotwire zones. Betterbidding.com, through its hotel list or by making a post on its site, can also help you identify the hotels on Hotwire that are listed for your dates of travel.