[Bushwacker]

There are good and bad roller trailers, but I've had a galvanized EZ Loader w/24 rollers and a Powerwinch for over 20 years and I love it. The higher capacity tandem models have even more rollers. EZ Loader seems to have best roller system, with nylon bushings on large aluminum shafts; very little friction, no lube required. Can load and unload singlehanded, anywhere, including my front yard if I have to. Virtually zero maintenance because the only thing that gets dunked in salt water is the tires;I've never had to even get the rims wet! I did change some of the rollers to yellow urethane to eliminate black marks on hull.

Regarding hull support, I was concerned too until I did some engineering analysis . . . with that many rollers the actual load on each roller is only about 100-150 lbs, and the bearing stress is actually quite low. There are no signs of flat spots on the rollers, and you can actually wiggle each roller with the boat sitting on trailer, even at the transom. I've checked the bottom of my boat and it's as straight as the day it was built. Look carefully at the EZ Loader system and you'll see how all the supports are free to move in two directions and distribute the load so no single roller can be overloaded. I've seen bunk trailers that also had keel rollers on each cross-member; if one of those rollers sits just a little higher than the rest, it can easily see a much higher load than the balanced rollers on an EZ Loader.

Only complaint I have is it's heavy - 900+ lbs for a 3500# capacity single axle; an aluminum float-on type is probably much lighter. Plus boat sits higher on trailer because of the big 15" tires; probably more of a concern with a 23. With a straight inboard, you might also need a special rear cross-member; not sure mine would clear the prop.