Ayuh,...... The simplest answer is to hire a transporter with a hyd. boat trailer,.......
With the hyd. trailer he could back in, 'n literally set it on boat stands, or stacks of blocking,....
If you insist on this guy with a lowboy, Yer gonna need a huge pile of blocking, 'n some steel beams a couple feet longer than the trailer is wide,......
You'll have to jack up the boat on the trailer, slide the steel beams across the trailer, then jack up the beams enough to clear the trailer, pull the trailer out, then lower it with jacks 'n blocking to set it on stands or blocking at the height you want,.....
I've done it both ways,..... With a hyd. trailer it's a 1/2 hour operation,...... With a lowboy, it's a long days work,.....