I use the quadruple, double, triple granny square knot, with the improved twister on the tag end.

I'm not sure what that is, but the only anchor I've ever lost was when I *used* to have a carabiner on the end of the rope for taking the anchor on and off...now I just take the whole rope and all off when I'm travelin'...it only takes about thirty seconds to string it back in.

Fish on...

Todd