This is a great little hike to the intersection with the AZT and back. Really cool rocks at the start with mountains in the background. Boring flat forest and then down a short stretch to the canyon floor and it was filled with short yellow aspen. Not many tall ones but they were all yellow.
The mileage of 1.0 roundtrip would be silly - - who would go 0.5 in and out and see not much of anything and go back? Although technically maybe that is the length of the Sandy's Canyon trail itself. Go at least to the AZT intersection and back.
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.