Take cash and a refillable bottle to Bottle Beach, and carry your rubbish out

Remote beaches here often run on cash, so I go with notes in a small dry bag before I set out. I also bring a refillable bottle, which cuts the plastic I would otherwise leave behind. Rubbish is the part that matters most. I cannot assume there will be a bin where I sit, so I carry a small bag and take everything back out with me when I go. It weighs almost nothing on the way home.