Our club has many of the mooring buoys that Ken Heaton mentioned deployed for free day and overnight use: http://www.taylormadeproducts.com/cgi-bin/catalog.pl?item_id=61. They are nice in that they do not present any metal to the boat.
They work well but are a bit hard to use here as the club doesn't attach pendants to them. Probably would not be relevant for you, but I've started to use a Grab-N-Go hook to attach to it easily. https://www.westmarine.com/buy/c-sherman-johnson--grab-n-go-mooring-hook--2643112 Bailey 1979 36-1 Lake Lanier, GA
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