My family loves to go camping, hiking, and fly fishing outdoors. We are conservationists and wouldn’t like to abuse Mother Nature’s integrity. I am looking for recommendations for the best portable option that can sustain us in camp sessions. Primarily, one with a larger holding capacity will be ideal. We wouldn’t want to keep worrying about where to dispose of the toilet waste while on camps. Also, one that consumes very little water will do justice to use since the gallons we carry sometimes get exhausted before our tour time elapses.