After conducting a thorough search, I was unable to find any information about a boat ramp named "Highway 2302 7322" in Southport, Florida. It is possible that this location does not exist or that the information provided is inaccurate. Therefore, I cannot provide details about the kind of boat ramp it is, how wide it is, what body of water it services, and what kind of craft are permitted on the water.

However, there are several other boat ramps in Southport, Florida that may be of interest. For example, the Southport boat ramp is located on State Road 77 and provides access to the Gulf of Mexico and St. Andrews Bay. It is suitable for small to medium-sized boats and has a concrete ramp with a courtesy dock. Another option is the North Bay County Park boat ramp, which is located on State Road 77 and provides access to North Bay and the Intracoastal Waterway. This ramp can accommodate larger boats and has a wider concrete ramp with a floating dock.

It is important to note that regulations and restrictions for boating vary depending on the body of water and local ordinances. Therefore, it is always recommended to check with the local authorities or boating regulations before launching any watercraft.