September 5th, 6th, and 7th, at Valley Camp - just east of North Bend, WA. This will be the 11th annual event.
It's basically a campout, with some digital discussions and demonstrations thrown in (not just APRS - WinMail, Linux and other geek topics explored).
But that stuff doesn't get in the way of food and BS'ing. Very low key event and a great private facility. Most of the stuff happens on Saturday, so if you don't have the time or inclination to camp, then just come out for the day.
http://www.nwaprs.infoBrad/N7JGX
Whidbey Island, WA