Interesting question ... I can't answer from experience ... so my thinking may not be helpful to you.
From the info I've got to hand here ...
slack-water at Okisollo Channel is 10 minutes before Surge Narrows.
it's nearly 8 miles between them.
travels at ~4kts that's 2 hours
On a day like today when both are running at about 10kts ...
One hour before slack at Surge Narrows is 4.5 kts
One hour after slack at Okisollo is 4.9 kts
Which means at my speed I wouldn't even get through Surge narrows until later, and arrive at Okisollo at closer to peak flow ... so I wouldn't even try.
However ... next week, when there are times with maximum current
flow of 2-3 kts it's a different game
altogether ... so on a neap tide I'd probably be happy to try.
is probably faster and so your window of opportunity will be a bit longer.