Our first big boat transport was from Lake Texoma to South Dakota (about 900 miles). We used Jim Chism with Hight Boat Transport based in Flower Mound, TX, just outside Houston. Have you tried him? He did a very good job, quick, reliable, communicated well, good cost, boat arrived in very good condition, and he has a dedicated boat carrier/trailer that was very secure and carried the boat just a few inches off the pavement. Not sure of his size limit, but ours was a 32 aft cabin and it took up less than half his rig - it looked like a toy boat on his huge trailer. Just google Hight Boat Transport and you'll see their contact information, insurance and license information, etc.