After conducting research, it appears that the South Road 4742 boat ramp in Crow Wing County, Minnesota is a concrete boat ramp that is 12 feet wide. It services the Daggett Brook Flowage, which is a body of water located in the northern part of the county.

According to Minnesota's Department of Natural Resources, the Daggett Brook Flowage is a 400-acre lake that allows motorized watercraft with a maximum speed of 40 mph. It is a popular spot for fishing, with a variety of fish such as walleye, bass, and northern pike.

While there is no specific information available on the kind of craft permitted on the water, it can be assumed that motorized boats, canoes, kayaks, and other similar watercraft are allowed. It's important to note that boaters should always check for any restrictions or regulations in place before launching their craft.

It's always recommended to check for the latest information on boat ramps and water bodies directly with the local authorities or organizations responsible for their management, as details may change over time.