Every thing you have on there is great.
If you make cookies, make sure you put them in ziplock baggies and take out as much air as you can. Sometimes it can take up to a month to get it to them.
-Cards are always good. Greeting cards with little notes in them, they are always welcomed.
-Little games...cards, small board games...the travel size ones
-Chapstick is a biggie they like.
-Powder...baby powder
-Gum is good
-If you send chocolate, M&Ms are good
-The powdered drinks that come in the tubes are great for them. Son in law says the water doesn't taste too good sometimes. You can get Crystal Light, Kool Aid, Powerade, Gatorade...tons of them out there...just look in the drink aisle.
-Sunblock/suntan lotion
-Baby wipes
-double A batteries
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There's more I could put, the list goes on and on.
One thing my son in law did say was....beef jerky went over ok, not all that well. Alot of people would send it, but it only made them thirsty.