I am planning on cooking for a biker rally Memorial Day weekend. The event will be 5 days. Last year the attendance was 30,000 people. I was thinking of doing 3 different types of cajun sausages on a stick, grilled. I am wondering how many of each sausage would I need to purchase? I am not sure how to calculate quantities for an event that has a possible 30,000 person turn out. The town is allowing 10 vendors. Any help would be greatly appreciated.