First of all, HAPPY FATHER'S DAY!
Second of all, if you're going to be in South Dakota in August, stop in Lemmon and watch the grand opening of the Hugh Glass Monument and Rendezvous Park to commemorate the famous grizzly encounter that nearly killed Hugh Glass. The attack occurred in August 1823 near the Shadehill Reservoir near Lemmon, South Dakota. In December, the movie The Revenant will be released starring none other than Leonard DiCaprio, telling the story of Hugh Glass, an early fur trapper.
For more info on the fur trade and Glass, pick up a copy of Win Blevins' Give Your Heart to the Hawks reviewed in my post of June 4, 2015.
(Ref: An article from the June 18th Sun City Daily News, Grizzly tale inspires South Dakota festival.)