If you're looking for a freshwater ramp that still has deep water, ocean access...the only ramp and game in town is *ALL* the way up the new river. See
This is far as you can go up the new river (my neighborhood) and keep a sailboat.
You're talking about 1.5 hours and a fixed 55 ft bridge to get to the Port Everglades inlet. There is free parking there, but I dont think you can leave your car/trailer over the long term there. To get to Bahamas, you would go out side port everglades and go as far south as you can go, then turn left and ride the stream back to the northeast, hoping to land in bimini. Then you rest after a trip across the gulfstream. After that, the Bahamas are yours!