Looks like everything has been covered in the previous posts the only thing I would add is when you are loading back far enough into the water to make sure your entire bunks get wet. Then pull ahead to your desired depth to load the boat. Much easier to crank boat on with wet bunks.
It is has mentioned a few times before but I am going to mention it again. Do not remove tarp, load boat etc. in the actual launch do all of this in the staging area. If someone is doing this mention to them nicely to rig their boat in the staging area, I have done this a few times and the people doing it usually never thought of it.
BOAT RAMP ETIQUETTE
https://vimeo.com/67253679