To save space and weight, I use a strong mason line,pink 150 lb strength spool with a small carabiner on the end. I carry about 3-4 large freezer ziplock bags in the pocket. If I need to anchor in a fast stream or windy conditions, I cut a small hole in the top corner of the ziplock bag attach the carabiner and fill the bag with either sand,gravel,or even some big rocks. If it gets stuck to deep, The bag will rip and I don't lose a 20$ anchor, and don't have to carry the weight back to shore. They are pretty tough though, and haven't got one stuck yet. Yeah I know plastic is bad for the environment, if lost though. Just be careful and try to retrieve it if you can.
FLOAT TUBE FISHING FORUM