When everyone visiting the upper Antelope canyon, you have a choice to book 1 - 2 hours tour from 9 different tour companies in Page AZ. Mainly, they bring you from Page on a pickup truck with other 14 people with you. By the time you get to the canyon during peak hours between 10 am. to 1:00 pm, more likely you will see around 200 - 300 people in there. The Upper Antelope canyon about 150 yards long, and 2 - 7' wide. Most of the time I was there, the tour guide rush people through this canyon, then come back for more. Therefore, if you are not on a "photography tour", probably most of your shots will have people walking in-front of your camera during 30sec. exposure. I have booked a 1/2 day "4-5 hours" photography tour from Carol Bigthumb company. Carol family is a owner of this slot canyon. Therefore, I have a front seat on all of the locations, when there is the time to shoot, our tour guide stops the traffic on both ways, and make sure no one is in our shot. Also, we could access other canyons nearby without anyone from other tour companies. In my opinion, if you travel this far, just run up your credit card so you can get the picture you always wanted.