Does anyone have a standard or rule of thumb to generate a logical number for volunteers and visitors in an urban area? If the school district doesn't have a volunteer program, then that answers one question. However, how is a visitor count calculated? I would think most visitors would be parents - thus it would be unlikely they would be straping the kid on the bike with them. I suppose I could just take the number from the # of visitor parking spots and call it a day? Any assistance would be appreciated. Thanks!