This is the first thread I have seen about pre travel mailers. I though I was the only one over the top a little. I am going to mail out a package with a welcome letter with some info about entry requirements, climate, what to pack, etc. I have luggage tags (flip flops and airplanes), I bought little travel shampoo containers at the dollar store and printed out labels that say "Punta Cana or bust" and have our wedding date, a shoe bag, and a carry on kit. In the carry on kit I am putting advil, gum, pens for filling out customs forms, antibacterial wipes for the nasty airplane trays, and hand sanitizer. I will probably include some type of candy or snack as well. I made my own shoe bags and bags for the carry on kit. They are here:
https://www.etsy.com/listing/194498930/10-travel-themed-muslin-favor-bags-gift?ref=shop_home_active_1
https://www.etsy.com/listing/194052484/large-beach-muslin-wedding-favor?ref=shop_home_active_4