I missed the first Wakarusa in '04, but was there in 2005, 2006 (the one with all the cops that prompted the move from public state park land in Kansas to a private site in Arkansas), and just one day in 2007. I skipped two of the years they had it in Arkansas. Mulberry Mountain is a great venue for a certain size crowd, but they had too many people towards the end.
I think my favorite festival has been Harvest Fest at Mulberry Mountain (which Yonder Mountain String Band took over as Yonder Harvest for a couple of years). The weather is cooler late in the season, and a lot of the “kids” are in school so the crowd is more experienced and mellow. “We used to experiment with drugs, but now we know what we’re doing”.