Planning your layout helps out a lot. Make a paper or cardboard template that you can use as a guide outside of the trailer. Lay your pieces out on the template before cutting. If you cut strips of the waxed paper that comes in the box to lay on the adhesive edges you can overlap the edges without the strips sticking together. That is helpful when trimming the edges for a good fit.
I left mine in the Trillium
as a floating floor with some finicky trimming around the curves. No trim or sealant needed. I have noticed the seams are now raised a bit on the edges after a few years. Sort of like real wood that has cupped a bit.