Do it yourself
Take the sails and spread flat on a lawn. Wash sails with a mild soap and water solution. Looks like you are in fresh water so salt should not be a problem. Wash (use a boat pole brush so you don't have to walk or knell on sails) Rinse off both sides and let dry. Takes very little time. Inspect sails for damage, tears, worn spots , fray. Repair ( see kits from west marine). Fold and store in sail bag in a dry spot away from animals (mice etc.)good luck