“41st Annual Okoboji Spring Fling” Square Dance Plus Weekend (“Registration” 7:00-8:00 pm; Cuers Dan and Allison Drumheller – “Pre-Rounds” 7:00-8:00 pm and between tips; Callers Mike Hogan and Jerry Junck – “Plus” 8:00-10:30 pm; “Afterparty” 10:30 pm).   Okoboji Spring Fling Flier and Registration