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I think Walter's advice is correct. You don't want any "rocking", but this does not mean that the bunks are carrying any weight.

I do it one bunk at a time. I use a ruler to make sure the boat sits level on the trailer and rollers. Measure from the rear cross member up to the bottom of the hull at the same place on both sides.
When the boat is level, tighten up the bolts on the bunk supports on one side. Then use a trailer transom tie down strap and tighten down firmly on that side.

Now go to the other side. SLIGHTLY loosen the bunk bolts, but not so much that the bunk moves by hand. Using a regular hammer, tamp/bump the bunks up tight against the hull, then firmly tighten.

Your hull will now be firmly installed on the trailer, and will not rock side to side.

Have a safe trip. I recently just towed my Outrage 25 1400 miles to FL for the winter. Took two long days, driving 62 MPH in third gear, 8-9 MPG!