Again, look to traditional native shelters and for that matter mimic the animals. A well constructed shelter is suprisingly robust if built well with proper angles to shed wind,rain etc. Julia Butterfly survived a massive El Nino storm, harrassing timber company helicopter that deliberately hovered within feet of her and 738 days of occupation. Her shelter consisted of two 6'x 4' platforms with cheap blue tarps on a scrap wood frame secured on a main crossbrace with climbing rope and nails!