Hi Joan, great question. Yes, EcoCamp are very proud of their composting toilets but when you leave the camp to go trekking you actually head right out into the wilds of the National Park. This means that you have two options. The first is that you can wait until you reach one of the mountain huts which, as Tim M pointed out, do exist but may be spaced quite far apart, or you can do the second option, which is to go somewhere out of sight along the trail. If you do take this second option, we must reinforce that you bury what you leave and that you take with you any paper waste, so as to reduce your impact upon the Park's ecosystem. Everyone is in the same boat, and the guides are extremely patient and understanding of your needs. If you have any more questions, just drop us a line and we will be happy to go over everything in deeper detail!