A tip from a friend led me to a spot where there was a fox den with a lot of new kits. I spent seven hours (literally) waiting for an appearance, staring at a hole in the ground. Finally, mom made a very brief appearance, coming out of nowhere. She checked the den, did a bit of digging, then headed off into the distance again.
Unfortunately, I never did see the little ones which leads me to believe she moved them to another den the night before. Darn! Nevertheless, I at least got to see her and she was indeed quite beautiful.