Something no one has mentioned is doing some legwork up front. Ask around the dock for recommendations for good shops and shops to avoid.
Sometimes a few conversations can save you a lot of grief.
95 Catalina 30 Island Time
“The sail, the play of its pulse so like our own lives: so thin and yet so full of life, so noiseless when it labors hardest, so noisy and impatient when least effective." - Henry David Thoreau