For Denali Photo Excursions & Midnight Sun Photo Excursions: There is no minimum to book, but we do have a two-person minimum for a tour to run. If in the rare case the minimum is not met one day prior to the reservation, we will try to reschedule or issue a refund. For Backcountry Photo Excursions: There is no minimum to book, but we do have a two-person minimum for a tour to run.