This has a little information about it...
www . magicalkingdoms . com/ftw/wdw/reception/crescent_cove . html
(not sure why the link doesn't work when i write it normally so excuse all the spaces)
Some photos...
www . magicalkingdoms . com/ftw/photos/crescent_cove . html
(ditto to this link too)
A map of Yacht Beach Club...
http://www.wdwinfo.com/maps/YachtBeachMap.pdf
The following guidelines apply for all Disney outdoor venues:
-No amplified entertainment allowed
-There are specific guidelines for showcasing wedding cakes
-Disney characters are not available
-Ambient noise, including watercraft horn signals, may be a factor during events
They don't have specifics on Crescent Cove in the Venues Guideline they sent me but I'm guessing it would be along the lines of Sago Cay Pointe at the GF.
Sago Cay Pointe Venue Guidelines
-Venue available for buffet style breakfast, lunch, dinner, and dessert parties
-Food and beverage minimum of $500 for dessert parties and $1,000 for any other reception event (exclusive of wedding cake, service charges, and sales tax).
-Maximum capacity is 75
-Mixture of 5 cocktail tables, 5 tallboys, or 2 rounds of ten can be used in this venue
-Capacity does not reflect 100% seating
-Venue uses existing lighting
-Additional fees apply if the Wishes audio soundtrack is requested.
-Be aware that ambient noise, including watercraft horn signals, may be a factor during event
Hope that helps! Also you can call Disney Weddings and just ask them. They would be happy to answer questions.