I'd like to thank Troy and Jstas for filling in some of the earlier history I may have botched in my post above. Another reason why older members with a deeper historical memory are important!
A longer fest, maybe three days is a reasonable idea. Because of the time, distance and money we do need to think about it as taking a vacation or, for professionals, as a conference. In my field we move our national conferences from the West Coast to the East Coast in three year intervals so that one year we're on the West coast, then in the Midwest or mid South, then usually in D.C. and then the reverse. So that's one idea, but it's still going to "cost"!
Another has already been suggested, "regional" fests with possibly an all in Polk Fest ever few years with the regional fests as feeds into that Big one.
I'd also like to pick up on something Jesse said above. My own history with Polk began with meeting doro (Mark) on the old Circuit City forums, he was the Polk rep there for a while and invited me to come over the Polk forums which I eventually did after the doors closed. I cannot begin to tell you just how many Polk products Doro (and to a lesser extent, yours truly) helped to sell on the CC site! I spent a lot of time "recommending" Polk and explaining "why" on that site. So do people here! One can "never" underestimate the effect that this forum has had and continues to have on sales!