To be honest Julie, content on this board is mostly done by people who do not work in Seattle radio. Most are radio enthusiasts who like to listen to the radio from far away places or talk about its history, or may work in the business but are in other cities.
I would highly suggest contacting the marketing and promotions department of radio stations that have personalities you feel would fit the feel for your event. Don't be shy to ask television stations as well.
While most contributors to this board are as I described above, I do know that some current Seattle radio pros read this board (but do not contribute). Another suggestion is to leave your e-mail contact information, but do it in a way that "bots" (automated programs) don't harvest your email address for spam purposes. Example: julie - at -- yourwebsitename -- dot -- com.
Good luck in your search!