Glen Canyon, Colorado River flyfishing regs?

Seeing as how this used to be my backyard, I ought to be the expert on this,
but I was not a flyfisherman when I left Flag, so I'm in the dark.

Can anyone tell me the definitive new regs on fishing in Glen Canyon? What
license do I need (its technically in Utah, but access is through Arizona),
is it mandatory C&K (it used to be in the past), and are there special
stamps/rules/lotteries/etc I need to know about? Can I fish after dark? How
far below the dam can I fish? Is there a National Park entrance fee?

A quick google search boggled my mind.

Thanks

--riverman