I have a fixed keel sailboat on a trailer. I need about 6 ft of water to float the boat off the trailer. Looking for a boat ramp that is deep enough has been very frustrating because any ramp directory gives info about the amenities, number of lanes, parking spaces etc. but does not include the depth of water at the end of the concrete. I want to launch in the Gulf of Mexico between Mobile Alabama and Panama City Florida. Any suggestions?