When booking a tour, find out the cancellation policy of that tour. For example, some will require that you cancel the tour within 24 to 48 hours of the tour. If you don't, you may be charged the full price of admission even if you do not go. Learn what this is in case of an emergency situation.
When you are booking a tour, make sure to find out what amount of physical activity will be required on that tour. If there is a lot of walking or the terrain on the tour is difficult, it may not be right for everyone on your trip. Find out what this will entail by asking before you book your tour.