If Seattle is on your way to the 2015 Worldcon, is near where you live, or just seems like a perfectly nice place to attend a fannish gathering, Prolog(ue) could be for you.
As Ulrika O’Brien explains, the idea was successfully tried before on the Other Side of the Pond:
Once upon a time, in the late days of the last century, there was a Very Big Worldcon Thing in Britain, and some fans there thought it would be nice to hold a smaller convention just before it, to make a space to gather up their visiting friends from far and foreign places and also local fans who could perhaps not attend a Very Big Worldcon Thing, so that they could all find each other to hang out and drink tasty drinks and play silly games and build upon the legends of their tribe together. And so they did that thing, and they called it Precursor, and it was good.
Precursor was held in 1995 before Intersection.
Prolog(ue) 2015 will happen in the vicinity of Seattle, east of Sea-Tac airport in Renton, on August 14-16 (the weekend before Sasquan). It will be a low-key fannish and literary event with a bit of programming, plenty of food and drink, and lots of hanging around the consuite, pool, and lobby having conversations with other fans.
Jane Hawkins is handling hospitality, Suzanne Tompkins is the hotel liaison, Denys Howard will take care of registration and memberships, Randy Byers has agreed to be Managing Editor of the fanzine/progress report, Mark Plummer and Claire Brialey are the UK agents, Scott Kriedermacher is in charge of craft beer procurement, and Ulrika O’Brien is the convention chair and promotions czar.
The convention will take place at the Red Lion Hotel & Conference Center: Seattle-Renton. Room Rate: US $139 / Night (1 King / 2 Queen)
Membership rates through May 16 are $30 (US) / $39 (Canada/Australia) / £20 (UK) / €28 (Europe).
Supporting memberships are $15 (US) / $19 (Canada/Australia) / £10 (UK) / €14 (Europe).