Without a doubt the high or low slack is a big determinant of where you will fish. Because the the high and low slack are tied unerringly to the direction the current will flow when it starts again. They are also tied to what spots will have the best footing too and how that fishability of a spot will improve or get worse when the current starts again.
Do not confuse low and high slack with low and high tide but do know that some spots will be perfect fish after say low slack when the current is moving and the spots to stand are exposed at low tide. Same on the other side of high slack when you can fish areas at high tide that may have too much shore between you and enough water to fish at other times.
Its a real advantage to understand what happens before and after the current related slacks and the tide related water levels. Sometimes its a huge blessing that the high and low tides do not coincide with high and low slack.
Yes its a complicated place and its hard to figure it out but taking the time to do so will pay off big dividends.
Catching I really cant help you with as I am still figuring out myself and probably will be for the rest of my life. Landing I can help with, there are some areas East that are very scary and difficult to land fish at low tide and other areas that I fish that actually have very safe flat areas at low tide. This does not say anything about fish being there but one thing to keep in mind.
I like to fish around low slack just so I have somewhere to stand. There are level spots exposed at low tide, so I'm not standing on rocks for a couple hours. I figure the fish might be anywhere, but I need somewhere safe to stand and cast.