In my opinion, use the wet method as a last resort or if you just want to speed the process up.
Trim the decals out, cutting as close to edge as possible. Align the shape you just cut out to the proper area of the sled, tack it in place with some masking tape (I started shipping strips of the wrap material for this purpose because masking tape doesn't always stick to the plastics)
Make a hinge across the middle of the decal while its held in place and install one half and then the other.
I should be getting a short video soon that shows the process well.
Where are you located and what kind of sled is it?