Get a duel axle trailer
Take it from the voice of experience. If you are going to haul the boat over long distances, get a duel axle trailer. In our trips to South Florida, we have twice suffered major trailer accidents due to bearing failures and axle failures. If we had a duel axle trailer, neither accident would have happened. In fact, we have spent enough money in trailer repairs to have purchased a duel axle trailer. It is worth the money and piece of mind.