Many times I have sighted in at the range and shot.Heck,once I was at a shoot and shot in the open class,got finished and changed everything,including the rest ,arrows,sights and release and went and shot the hunter class.
Count only good shots in the sigting in procedure,if you know the shot wasn't solid,forget it.
Of course,using a program to make a sight tape and in turn set your pin gap will help greatly in a quick setup.Just need to set 1 pin.