I have found good fishing at Quonny on an incoming tide but mostly on foot and I didn't fish there much last year so the pattern might well have changed. With a 7:00 pm low Friday = 01:00+ high Sat a.m. - might be worth fishing the outgoing through sunrise?
I haven't done an all nighter this season yet but it could be interesting coming off the new moon tide yesterday?
One other thought for early am Saturday in the breachways would be hardtail activity - if they are in the vicinity?
When sight fishing, look over your shoulder from time to time, you never know who's behind you