Mr. RR and I used to travel alot overseas. I learned how to pack.
Try to put everything in a carry-on or gate-checked bag. (Really no need to pay extra for checked luggage.)
Underpack!
Pick one color scheme.
Pack only non-iron clothing.
Instead of folding your shirts and slacks, lay them flat, roll the slacks, fold the arms in on the shirts and roll them. Fewer wrinkles that way. Take a small steamer with you.
Make a copy of your passport and put it in your carry-on. Keep the original passport with you.
Enjoy your trip.
No need for a steamer. Take a small spray bottle from the $ store, fill with water, lay out or hang up the item and lightly spray and just run your hands over it and VOILA the wrinkles are gone.