When I wear a rescue vest I keep the tow tether on the ring. It loops under my dominant arm and then clips to the front of my vest where I can get to it easily. I keep a locking biner on it, although I only lock it when setting up a static rescue like a Z drag. I find trying a knot that unties when I pull on it easiest, but others prefer putting it in the zip pocket easier.
I also keep my pin kit stuff handy, in my case, in the zip pockets. My best suggestion is not to take anything anybody says as gospel, but to fiddle with your gear and practice until you have a smooth system.
I'm not a big fan of carrying static line in decked boats. I have done fine using throw rope. Learn the Butterfly Hitch. It makes that kind of thing simple, because you can easily put a loop anywhere in a rope, and it comes out easily after being loaded.
Alpine Butterfly Loop | How to tie the Alpine Butterfly Loop | Climbing Knots