We never go out early on full moon (previous night). Salmon basically have better eyesight and use moons light to eat bait all night long. By 6 am they're full. However, a salmon needs to eat a lot every day, so by 11 am they start biting again.
So that's the time we're generally back out after a full moon. I've seen many guys give up by 10 am, and pack it in. But if they wait, almost consistently by 11 or 11:30 am, the bite turns on.