Automatic Bow Latch. These devices automatically latch the boat’s bow eye as it nestles on the trailer’s bow roller. One of the most popular is the ­Drotto Catch-N-Release ($314.99 for 3 ¾-inch model; ...

Also, be sure not to leave the trailer in the water too deep--otherwise, it can be a bear trying to get the boat to square up on the bunks and stay in place long enough to haul out.