You have a decent case... just not the best case.  Most people who get charged with this type of offense simply take off and exhibit no signs of intending to return.  However, you do have some good factors in that you voluteered your actions, you were taking pictures, and you came back.  The main negative factor is that you didn't call the police to report the indicident.  Even at 3:00 a.m., the police are awake to make a report.... which is who you could have notified.  Considering the positive factors, you have a shot at trying to get the prosecutor to drop your charges.  It's not the worst offense to have on your record, but if you really want to keep your record clean, considering hiring a criminal defense attorney to assist you with these negotiations so more of your statements are not used against you.