MNN – Valleyfair’s Soak City is officially opening for the season on Saturday, though the controversial chaperone policy will still be in place. Beginning last year, the chaperone policy requires all guests 15 years old or younger to be accompanied by a chaperone who’s at least 21 years old to stay in the park or be admitted after 4:00 p.m. Opening weekend specials will include sampling from the Boston Beer Company, and Indeed Brewing and Valleyfair is offering free tickets for active and retired members valid Friday through Monday.