It’s a hot and beautiful summer day at the bottom of the Grand Canyon as I stand in line for a sandwich. Our rafting guides have set up an amazing spread of fixings. There’s even vegan cheese for me. All that’s missing are plates and napkins. After washing our hands with river water and soap in a foot-pumped bucket sink, we put our bread on one hand and try to layer on all the sandwich ingredients with the other. Scooping out avocado is especially difficult one-handed. It’s clumsy, but admirable when you realize we are generating no paper or plastic trash. Then we sit at the river’s edge so that the rainbow trout can eat any of our food. Continue reading below Our Featured Videos Plateless lunches are just one way that rafting outfitters like Wilderness River Adventures (WRA) keep the national park pristine for the approximately 27,000 people who raft the Grand Canyon every year.…