I've done three inn the last couple years. Two Navy( one was a WW II Seabee) and one Army. The Navy ones were during warm weather, so dress slacks,white shirt, and a tie. The Army was fairly chilly, I wore a suit( also turned me towards a delrin cup mouth piece). I stayed off a piece to avoid being center of attention. None had rifle squads. The recurring gig with the local American Legion post involves rifle squads