I live in the tropics and am lucky enough to fish more that most people have ever dreamed of. I have found that salt, sand and gelspun do not mix for me. You have to be careful, very careful with gelspun when your fish makes a run, and they often make unexpected runs. It can cut deep into your fingers if you are not careful and, if that happens, your fishing adventure becomes less enjoyable. Finger cuts mixed with sand can be miserable. I use Cortland or Scientific Anglers 30# backing and never have any problems. I actually like the Cortland better but, living where I live, it is not always available. I hope you enjoy your trip.