Never tie off to the back of your boat. That is a good way to lose it. You could probably get away with it, but if you lost power and floated downstream GAME OVER. Always make sure your kicker is up as well.

You can pull your anchor up with 20 feet out so no you don't have to let out more line. Just angle away from your bouy as you power ahead and you will be fine.

Kris
_________________________
There's no head like steelhead!
Operations manager of coors light testing facility.