If you ever wondered what would happen if Fyre Festival and a political rally had a baby, Donald Trump's Great American State Fair may have provided the answer.Billed as a celebration worthy of America's 250th birthday, the GASF — which ends Friday — may instead be remembered as a case study in how hype and wishful thinking can outrun reality.Fyre Festival organizer Billy McFarland promised a luxury music eventl complete with private villas, gou…