I had my boat shipped from California to Colorado. You didn't indicate
the size of the boat. My moving company recommended a shipper. Going
there, (a trailer boat) they put it on a "5th wheel" inclined trailer
(held 3 vehicles). On the return trip two years later, they used
a large forklift to lift it on a flatbed truck trailer.

The boat was a 17 foot I/O on a trailer.

b.