Sorry, I'm no help here, I'm on a manmade lake with, very little current and 105 miles of undeveloped shoreline, I very rarely anchor. I have thoses bungy docklines, with a loop[ at each end, on all four corners of my boat, when I do anchor, it is usually in 15 feet of water or so, I have 50 feet of line on the anchor, with a good carobiner, on the end. I drop the anchor in, snap the carobiner thru one of the loops and that's that.
2006 Forester 19 Fish (new deck and carpet, Pontoonstuff interior, 2019)
1996 Mercury 50 ELPT4S
1983 Sea Nymph FM171 Striper (complete rebuild from hull up, 2014)
1985 Johnson 70 J70ELCO
Raystown Country, PA