I'll take a stab at promoting a roller trailer:
I used to have a bunk trailer on my old boat, all my friends have bunk trailers and I do like them. I picked up a used Lund in the fall and it was perfect in every way except it had a roller trailer. Now that I have some experience with it, I really like the roller trailer.
My old bunk trailer had the carpet wear of the back of the bunks within two years. My roller trailer has 20 individual rollers on 4 racks, so I don't feel that support is a problem on a 16'8" hull. When I load the boat I have the back set of rollers in the water and the front set out of the water, I can push the boat up to the front roller with 1000rpm, I leave the motor pushing while I hook up the front strap. I find my roller trailer with load guides is more consistent than my old bunk trailer for loading the boat straight. I do miss the bunks when I launch though, nothing easier than dunking the trailer and driving away. It would be nice if the rollers only rolled one way, allowing to load with ease but not roll back.
Rae