Besides protecting your water and fish, a co-worker told me that some states make you liable for any injuries that someone incurs on your land regardless if they were invited, unless you post NO TRESPASSING signs.
Every state is different.
Indiana does not hold the landowner liable unless they are recieving compensation from the person on the property (like a hunting lease). No signs necessary in Indiana. If you don't own the property, you must have written permission to be on it. Period.
