Please note: Once you receive your booking confirmation email, please confirm your chosen Grand Canyon South Rim Tour date & time by calling the reservations team on (+1) 702 739 7777 at least 1 day in advance of your tour. Please also visit our booking portal (https://checkin.bigbuspartners.com/en/checkin) to select the start date and time for your hop-on hop-off Big Bus Tour, your High Roller visit, and your Night Tour, and download your tickets.