I registered a boat in NC back in the early 90's(nacra 5.2), an I did need a bill of sale notarized. But I seem to have done it all by mail, which kinda defeated the purpose. I was then able to transfer registry to SC where i lived at the time. SC requires more paperwork for boats, but nothing for a trailer. NC will stop you on the lake and check your stuff, been there done that. Ive even been stopped(or rather approached) by a DNR officer out of the coast of Myrtle Beach. He was in a Jon Boat and I was beam reaching the 5.2. He told me to stop, I played dumb, he left after a few minutes of "high speed dueling"