I find packing everything really, really tight in the suitcase helps a lot with wrinkles. So my husband's tuxedo, jackets and anything of mine of that nature will go into one suitcase. Things that aren't flat in shape and/or that don't tend to wrinkle go in the other bag. Holland American has laundry rooms with irons. I would think even something pretty delicate would be alright if ironed on the wrong side with a very cool iron. But I also agree that paying to have it pressed is fine also. In the grand scheme on things, what's a few more dollars, right?