MelissaPA said:
How do I know where I can and cannot use a MD in my area?
Some of us "old school" md'ers, don't believe in asking permission to hunt public property like parks, schools and such. Usually, if some maintainence person objects, you smile and say thank you, then leave. I've only come close once to being asked to leave a place in the last 20+ years. His issue was underground sprinklers and simply asked me to detect a different part of the park where no sprinklers were....even gave me a tip of a lost wedding band in a baseball infield...I ended up leaving
anyhow when I ended up with a crowd of small children following me around.
Most local and county parks are fair game.
Pa. State gamelands are a no-no.....(enter at your own risk and risk losing your equipment if you run into some gung-ho trooper)...but heck...sometimes I like a good risk...but that's me....and I simply disagree with their reasons. All I see there is a big "Welcome to Pennsylvania State Gamelands" sign...nothing about no detecting...but on their website...the rules are listed. (you didn't hear that from me)
Pa. State parks...it's a good idea to check in with the ranger.
National historic sites

....definately a big no-no....you'll ruin the hobby for everyone if you get caught. This is a big reason for a lot of laws we suffer with now. People stealing obvious historic treasures.
Pretty much, if it's your tax dollars supporting it and it isn't posted, it's open game. Just use some common sense. Don't do schools while they're in session, don't do beaches when lifeguards are on duty (pretty sure that's the rule in Erie), etc.
And above all, be courtious at all times and fill in your holes. Don't leave a trace of your being there.
Have lots of fun and great finds,
Al