I wanted to make my trailer more user friendly for unloading in shallow water. I added rollers, Side guides that stick up so can see trailer behind my pickup & help guide boat on, built a walking ramp out of old set of running boards. I also to reduce rock chips diamond plated around outsides of frame. On top of guides I installed small LED lights. If notice also trailer splits where tongue attaches in middle to drop back down for shallow water loading. You can see locking pin and key hanging on small chain in second picture.
Other thing you see in third picture is a eye bolt on back left side of trailer. I use this for unloading where there is no dock. Where there maybe deeper water.
I have heavy rope cut length about 1' longer then boat with quick snaps at end end. Just before I back into water, I hook to eye bolt & other end on eye bolt at front of boat. I back up til boat floats, hit bakes boat floats back, drive ahead slowly pull boat up to shore, & unhook from trailer. Pretty quick & easy when one is alone.
I also installed diamond plate on fenders & built enclosure to install LED lighting
Got tired of lic plate breaking off unloading in shallow water, so got truck mud flap, cut it to fit plate, and mounted it on to plate bracket.
Used extra to make small mud flats for each side.