Re: Unloading???
Install a set of inexpensive plastic bunk slides/slicks. Some I have seen are so slippery, you cannot drive the boat up at the ramp as it just slides back down. They install in minutes with supplied screws.
They also have aftermarket roller bunks, but the price and fitting is a lot more involved.
I don't know the weight of your boat, but you do have a "PO Folk" tilt trailer. Just unhook from car, move vehicle away from trailer ~length of boat and lift the tongue skyward.
With the plastic slicks you'll have it off in a jiffy. You may have to pull the trailer forward a bit to get the nose off (you might not), and the trailer will usually squirt forward a bit.
You can also use the reverse technique to get it back on the trailer. Unhooked trailer, pay out the winch cable, hook to bow eye, start cranking. The tongue going up makes for a much smoother bow transition.
Always test where your lights/plate will land. The plate holders are fairly flexible or you can double zip tie them, so they will flop over.
WE usually will drop them on a tire(s) if its a hard surface.
Go get 'em.