This info is many years old....hopefully someone will be able to confirm or deny, but...
There used to be a launch/ramp at the East end of Marina Rd. in Orange Beach. Puts you in the bay right near Perdido Pass/Bridge, so you could sail bay or gulf. Used to even have a grass/beach area where you could even unload w/o using the concrete ramp. It still looks to be as I remember on Google Earth (30 17 02.42 N, 87 33 16.24 W). Last I was there, it even looked like launching was possible under the bridge. Be very aware of tide/current/wind direction in that pass!
That area is very crowded in summer and beach access is at a premium. A visitor is lucky if he can even find a place to park his truck/traler for an extended period. But it is a VERY cool place to sail!