Bernie -
I do not wrap wet anchor line tight around any wood, cork, and canvas covered decoys. I leave it a tad loose. Dry it after the hunt, then rewrap.
As for the final wrap around the head. I will do it, if it is a decoy that I made, and that I can trust as much as possible. Prior to rigging my decoys they must pass the "Back Yard Test". They get thrown, and tossed around the back yard several times to see if they pass or fail.
As for the keels notched to hold line. I have made them on several decoys. In theory they seem to be helpful, and on calm, take yer time days can work. Other than that, they are a PITA, especially with long lines and heavy anchors.
Seems like nothing is Fool Proof, but we sure do try.
Having everything in order, stowed ,and ready to go, setting decoys out in the dark is not much of a problem. The more experience the better, you learn from your mistakes, and prepare.
Picking up when things get Fugly. It's boat hook, net, paddle, or whatever means there are to prevent leaning over the side. Gettem In and go!
Once safe you will have time to sort things out, wrap lines, and prepare for the next hunt.
If you have a good hunting partner, you will work in unison with few to no words spoken. You each know the drill, and the job that needs done as safely as possible.
When hunting alone, it's all on you. So be prepared.
my 2 cents
Best regards
Vince