I guess that it won't work for everyone...
A lot of it I'm sure has to do with scheduling the venue and other sledding shows. The vender's are set for some long weekends coming up and it's only just started. A few weeks ago Heydays, then Boise, next weekend Denver, off to Puyallup, then to Salt Lake and then Spokane... that's just the ones around the west not to mention some vender's from the states head to Canada and to the mid west.
If you want to make a show head to Puyallup here in a few weeks. Great show with tons to see and a huge swap meet. Good excuse to see Seattle so take an extra day to see the sites.