Move, anchor...move, anchor........maybe drift a bit as well.
I do most of my fishing while anchored out deeper of the area I intend to fish. I leave the bowmount deployed and simply raise the anchor, move a bit via elec and gently drop the anchor a few yards up/down river and work it a bit and move on again.
So I've always liked having a "drift boat" style anchor ratchet system.
Here's a pic of my setup: http://i111.photobucket.com/albums/n...n/DSCN3468.jpg