[QUOTE=Alamosa;369540]I sure hate the idea of having to carry "everything" out, but have to admit there are probably times when it is reasonable and necessary. The big difference between people and most animals that are part of nature is that we tend to congregate and re-use the same area more.
I have seen carry out situations for river treks where people re-use the same stopping points over and over. It will probably become the norm in many national park and forest service back country sites that see heavy use.
All permitted rivers in the Western US require solid waste to be carried out. We have to have water tight, cleanable toilet systems, and the river rangers are quite stringent about checking each group for the proper set-up. Most Western rivers also require the use of firepans for wood or charcoal fires, and all ashes must be carried out along with our trash. I can't imagine the impact on the river corridors & camps if these rules weren't in place. As a new hammock hanger, I'll have to start adding tree protection, and hammock site selection into my river etiquette.