Cell Service
You will probably not have any cell service for most of the time you are actually in the canyon. Do not fear the time you spend disconnected, revel in it. If you truly have a legitimate need to make a call, you may be able to get a signal closer to the village. The lodge itself has wifi.
Other Tips
Experienced hikers may already know that the hikers heading out always have the right of way. In this case, it’s important to note that the hike out is fairly difficult. A hiker’s momentum can be impeded every time he/she has to stop to step aside for a fresh hiker who is simply heading down to the falls.
Finally, no drugs or alcohol are permitted there.