I would suggest for best results use a marina grade wood not just a treated wood as used on a house deck. The marina grade will last longer and the chemicals in some standard treated wood will react negatively with some aluminum hulls, know of no problems with glass hulls. I would glue it in addition to the staples, other wise all the sheer stress of loading and unloading will be placed on the narrow staple legs and could lead to ripping and bunching of the carpet. I have always glued them with no problem and years of use. I can not think of an advantage of leaving the carpet semi loose but maybe I'm missing something.