Be sure to check out:
...and any book by Steve Allen. Canyoneering 1,2, and 3.
IMO, it is the premier online resource for canyoneering in the USA. Gear, links, maps, technical advice, etc --- and MUCH MUCH easier to sort through than Kelsey. He does have a new book out as well that is better, but still not as clear and concise as the above references.
Have fun in the canyons!