Upon researching the boat ramp named WMA Access Road Cumberland County, it appears to be a concrete boat ramp located on the Maurice River in Cumberland County, New Jersey. It is managed by the New Jersey Division of Fish and Wildlife and is part of the Cumberland County Wildlife Management Area.

The boat ramp is reported to be 16 feet wide, which should accommodate most small to medium-sized watercraft such as canoes, kayaks, and small fishing boats. However, it may not be suitable for larger boats or those with trailers.

The Maurice River is a tidal river that flows into Delaware Bay and is popular for fishing, boating, and wildlife viewing. According to the New Jersey Division of Fish and Wildlife, the river is primarily used for recreational fishing, and common species caught in the river include striped bass, bluefish, weakfish, and white perch.

As for what kind of craft are permitted on the water, it is important to check the latest regulations and rules set forth by the New Jersey Division of Fish and Wildlife. Generally, non-motorized boats such as canoes and kayaks are permitted on the river, as well as small motorized boats with proper registration and documentation. However, it is recommended to check the latest rules and guidelines before launching any watercraft.