If you are registered, you get access to the members only section, can participate in the buy & sell second hand forum and last but not least you can reserve your preferred username before someone else takes it.
Just an FYI about slot canyons. They can be dangerous. 11 people drowned in the Lower canyon 10 years ago...the danger is much less now but still present. This past week, two people drowned in the Egypt 3 slot canyon at Grand Escalante.