Groups of 10 or more will have a 50% non-refundable fee kept on any cancellations or changes regardless of how far out they are made. Customers may be required to sign a contract. Decreases making total due less than the 50% non-refundable fee will not receive any refund of original payment. Any decreases to passenger count within 72 hours will not be refunded. No shows will not be refunded. Additional seats may be purchased on site based on availability. However, seating will be reserved for the final guaranteed passenger count. A representative from GrayLine will contact you shortly after booking to discuss group specifics. If you would prefer to book your group booking via phone please call 800-450-7139.