The only thing that should touch the rollers is the bow of the boat, to
keep i off the cross members when it's coming up between the bunks. The
outboard bunkers do nothing to make driving on any easier. It's the center
bunks that straighten the boat out. on most hulls, they closer to the keel
they are, the better job they do, because they pick up the steepest part of
the V. If you don't have enough V to align the boat, then you'll need
outside guides to bounce the stern to the center. But the biggest mistake I
see people make who can't get on a drive-on trailer straight, is to put the
trailer too deep in the water. If the stern is still floating when you're
an foot or two from the winch stand, then you've got the trailer to deep.
The bunkers can't straighten the boat out if they aren't in play.

RichZ©
www.richz.com/fishing