I have entered long creek from the intercoastal in an 11' kayak at mid tide. There was just enough clearance but I navigated carefully around some areas that looked too shallow. I have not been through the entire length of the creek, but I believe you should be good at high tide. There are many branches off of the main Creek, so there's probably always a way around a shallow area.
I have the same questions. The creek looks narrow and from the satellite pictures you can see oyster beds when it nears the ICW.
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