I've played at night in the woods with a group of guys... but it was almost impossible to see anyone. I think if you used a set of nearby lights or car headlights to shadow the area you are playing in it would be fun.
We gave each player a flashlight for taping to the end of their barrel. The rule was that if you were shooting you had to have your flashlight turned on... worked okay.
Another good rule is that ANY HIT COUNTS... including bounces. Its too hard to tell if you are hit at night so we made bounces count as hits.
It was fun and worth trying at least once.
