CE Smith Pontoon Boat Trailer Guide-Ons Pontoon boat trailer guide-ons are a helpful tool to make it easier to load your boat onto your trailer and also help with backing the trailer into the water and getting your trailer in at the right depth. These boat trailer guide ons provide a visual target to guide you in the trailering and untrailering of your boat. The CE Smith pontoon boat trailer guide-ons come in sets of 2 and are post-style. These guide-ons attached to the rear of your trailer to e