Very good start Ryan. On of the things with slot canyons is the smoothness of the walls which is created by thousands of years of water running through them. Visit 'Arizona Highways' magazine for info and pics on these - also, Google may be a good source for reference.
Once when hiking through southeastern Utah, we discovered one of these. Actually, kind of scary since we found this open crack in the ground. If one was not careful, they might have fallen into it. We were close to the edge and dropped a rock into it. I kid you not, it took about four seconds before we heard a sound - then, a splash. We were not equipped to rope down - but, one could only imagine what was down there.
Good luck on this; looking forward to your progress.