This was my first time around Pass Mountain, and it's a very good hike, combining both distance with some uphill work on the back side of the mountain. All combination of cacti are along this trail. There was no noise except from the gun range toward the end of the hike (I went counter-clockwise). There is a great saguaro forest on the East side.
A campfire must be extinguished by drowning it with water, stirring with a shovel, and repeating that process until the campfire is cold to the touch. A campfire is still a danger if it has any trace of heat, and must not be left or abandoned. Wildfires can begin by abandoned campfires that rebuild heat on windy days and then blowing embers ignite surrounding grasses and brush.