The greenies will try to ban everyone who doesn't carry a <30lb pack. They've tried to ban pack animals in a couple wilderness areas here just because they don't like to see horse manure. They didn't get very far with that.
It won't be the "greenies" that stop goats/llamas as pack animals. It'll be the wild sheep organizations. I know of one wild sheep hunting org in CO already has it on their radar...
