I have used a boline and clinch know but I always put a whip finish on the tag end because I mysteriously lost an anchor on the Bogachiel in the middle of a drift. This year I spliced my anchor on... it wasn't that hard and it drives me crazy to have the anchor swing while you row. This way the line is still small enough to pull all the way into the first pulley.
Another trick my buddy uses is to split a tennis ball and pull your knot up into it to keep the anchor from swinging. To each his own

Splicing directions-
http://www.machovec.com/rope/splicing/db_eye.htm

Good luck!