Jerry Litynski , Jul 19, 2002; 09:47 a.m.
You may inquire with the local law enforcement office, but rather than argue, just move on would be the easy way. (You cannot use the photos for other than your personal enjoyment...unless you could get the father figure to sign a release.) Or use a stronger telephoto lens.
There is no right answer. You have rights. The family in the park has rights.