If you're into kayaking, I would like to recommend a very useful site: InflatableKayaker.com The guy who runs this site, Jason, has a great blog and lots of reviews of inflatable kayaks. There is a Michigan Kayaking Guide as well as a Texas Kayaking guide that can be downloaded as a PDF. Check it all out.
Looking for a summer cottage rental?
Here are a few links to other marine sites:
Ports By Boat http://www.portsbyboat.com/
Yacht Basin Marina www.yachtbasinmarina.com
Great Lakes Scuttlebutt Magazine www.Greatlakesscuttlebutt.com
Gunnar’s Yacht & Ship http://www.yachtworld.com/gys/
Portside Yacht Brokers www.Portsideyachtbrokers.com
Bayshore Yacht Club www.Bayshoreyachtclub.org
Macatawa Bay Yacht Club www.MBYC.com
Anchorage Marina www.Anchoragemarine.com
Lake Ranch Resort www.lakeranchresort.com