You need to go and pick up an "Anchors Away", its a little like a bungee cord but used between your anchor and the boat along with the anchor rope it allows you to pull the boat to shore and keeps thins tight while never having to adjust your anchor, love mine, don't know who has them in your area but mine came from Cabella"s.
I use a plastic coated carabeaner ("Cara-Vato" as we call them) so it wont scratch the gelcoat.