If you are worried about backing the trailer down the ramp do what a lot of us on here do. Install a front receiver. I installed a Draw Tite front receiver on my 2013 Ram. I tucks in nicely between the front tow hooks. A little bit of a pain to install for a person with big hands. I even had my wife, who has very small hands, help me. In fact I ended up removing the grill to get into a couple of bolts.
Also you have a 4X4 so I wouldn't worry to much about being pulled into the water.
Maybe BradW well post on here, he has a picture of his rig when it broke down on the hook of a wrecker.
