Yes, I do carry shelter. If I'm going into an area where there are no trees, then I carry a bivy, otherwise I carry my poncho and some cordage and lash it over my sleeping pad (or hammock depending on where I am) to keep the wet and wind off. Besides the military issued poncho, I carry a cheap full sized plastic poncho and drape it the other direction offering me better protection if a summer storm blows in. The poncho liner slips into the inside pocket of the ruck that normally held the german folding sleep pad and sets against my back, offering some padding while hiking and adds warmth to my sleeping bag on cold nights. On mild nights where my bag is good to go, I fold the liner and place it between me and my thermarest ultra light pad for extra padding and protection from the ground. Total weight, not including longbow and quiver of arrows is 25# and if I add the bivy shelter, it's 28# within a few ounces.