The previous posting has an error. The Wilderness Aware Salt River overview map is here... Salt River Map Arizona Whitewater Rafting
Click on the red boxes to get a close up map with more detail.
SHUTTLES!!!! Wilderness Aware also has the best service for shuttles on the Salt. They have a lockbox to drop off keys at the put-in, so you don't have to find someone to give keys to prior to launching (that can be a pain to find someone and hidden keys make it easy to break in to your car at the put-in) . However, you do need to call ahead to set up the shuttle and pay with a credit card. They make every effort to deliver your car on your take-out day and you can park your car near their office at the put-in.
It is not a good idea to do your own shuttles ahead of time as there have been occasional break-ins at the take out. Leaving you vehicle for several days definately increases the risk of theft.