This, 100%. New Hampshire took steps to eliminate this by making it impossible to sue the property owners if you hurt yourself on their property (unless they charge a usage fee). Effectively makes "use at your own risk" an implied statement for all free-use property in the state. Owners who open their property still have a duty to warn about dangerous conditions, such as an old well that may be hidden by overgrowth, but otherwise recreational users have very little legal power to blame their own mistakes on the property owner.
It also has the side-effect of potentially keeping more property open for free use, because the land owner now has to weigh income from usage fees against recreational immunity.