I came through Knapps Narrows successfully twice over the weekend, both times at about mid-tide I think. Our boat also draws 4'10", but a realistic 5' or 5'1". Last year we grounded on the west side coming out, so I hug that red marker and go real slow. Very little room to the north.
I'd like to see some more small can markers on both sides, east and west, to make the channel more obvious.
Last fall there where some temp. buoys but where not there a couple weeks ago when we went thru.