We thought that channel entrance was a little treacherous as well. We slipped through with a 5 foot draft, but the heart rate was definitely up the first time through. We also used another channel with range markers to the south of the cut you used that then parallels the beach, although I have heard it has since shoaled a bit. You might ask around for some local knowledge on that, although you now have the other channel down pat. We got bounced around on Gun Cay too, its not very protected in most wind directions. Have a blast. Fair winds.