AlphaDog,
I've had good success calling grey fox at night with the occasional red fox showing up. I've always used a grey fox pup distress tape in my caller, a shotgun w/ #2 size shot ( full choke) and a wheat light w/ a red lens, on my hat.
There have been times when I thought that having the light attached to my shotgun would be better, but what I have works so I'm not messing with it.
I've gotten away from the night time calling and am starting to use a motion decoy for more coyote type calling. However, I'm working a lot of overtime and haven't had a chance to use the rig, but once or twice. 
Here in Ohio, I believe that fox (red or grey) are much much easier to call than coyotes. Both are fun! /ubbthreads/images/graemlins/laugh.gif
Good hunting, Bowhunter57
