Easy stuff.. done it a zillion times before on lots of different boats. There are a few different ways you can do it. One way is to jack everything up on the trailer.. 6 inches to a foot should be good.. then place blocks under the hull in strategic points and lower trailer. You can use whatever you have handy to block it up.. cinder blocks and 2x4's, 2x6's, etc, with a scrap of carpet on top to keep from scratching work well. My favorite is styrofoam blocks.. I picked up a few from the local Tractor Supply that they were throwing away. They were used to keep the trailers from hitting each other when trucked in and are about 2 foot square. You can also make your own with some cardboard boxes, a couple of large garbage bags and some cans of 'great-stuff' spray foam from the borg.
If you only need a little clearance, a real easy way is to first drop the trailer tongue to the ground which raises up the rear. Block up the rear, then raise the trailer tongue as far as it will go up and block up the front of the hull. Once blocked, drop the front to give you clearance between the trailer and hull.
I've also suspended hulls under a pole barn using tow straps as well, but not everyone has a pole barn
Cheers,
Brad