Ahh, misread the post. In my experience I've been out for multiple days of heavy rain, including a hurricane and never experienced a leak with my Shamrock. One thing I can suggest is getting a peltier dehumidifier. I have had an
Eva-Dry 2200 for going on 4 years now and it kept my hybrid mildew free during storage and my sheets feeling dry during rainy camping. I don't camp without it now.