Any time I tie down a load, I use the boy scout tent rope knot. Holds better than anything I know of, easily adjustable. Tie down a load of lumber. Drive 5 miles and stop. Just grab this knot and pull, it’s tight, unties just as easy, but I’ve used it to pull vehicles too.
www.ropeknots.com/rope_knots/tautline-hitch
I’ve used it since about 1966 when I had to learn it for boy scouts, most useful knot ever. OK except shoelace knot...
This is a good site (NetKnots.Com) with "video" for knots: tautline-hitch