Is Metal Detecting allowed: YES, you can detect with or without a permit in specific areas. Contact the park staff to ensure if a permit is needed or not. See more info in the link below.
You can view the state regulation HERE:
(8) While many activities are allowed on park property, the following activities are specifically prohibited at park properties, and a person may not engage in:
(d) Using a metal detector or similar device without written permission of the park manager or designated employee at any park property or portion of a park property not listed on the “Detecting Allowed” list, published on the state park website;
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.