Is Metal Detecting allowed: YES, with registration.
Excerpt from Park Regulations HERE.
Metal Detecting:
For those seeking to discover a hidden treasure, metal detecting is allowed in certain areas in 11state parks; however, registration is required. The activity is allowed only on specific sand beaches at these state parks.
Registration is required and allows the user to operate a metal detector on the beaches at the listed parks. The permit is valid for the current calendar year. State parks and historic sites protect our natural and cultural history, and no object of historical or archaeological value or interest may be removed from a state park. If you find such an object while using a metal detector, please immediately notify park staff.
Metal detecting registration is free of charge and may be completed by clicking here
FMDAC Disclaimer: FMDAC assumes no responsibility for any person who knowingly or accidentally violates any state park regulation. Although FMDAC will try to keep this information current we cannot anticipate how each regulation will be interpreted by a specific park department, park employee or other government employee. It is the sole responsibility of each individual to know and obey the regulations of the park or area they are visiting and or metal detecting.