I am interested in building the Guillemot, but I am concerned with several design aspects of the boat. I typically do weekend trips in both open water and rivers (not whitewater). Considering the relatively short waterline length, is this boat suitable for longer trips? Has anyone used this boat for a weekend or longer excursion? Also, the boat seems to have fairly hard chines, does this decrease the secondary stability? How stable is this boat in rough waters? Any info would be greatly appreciated.