What to put in destination wedding bags?

Are your talking about packing in general or your wedding favors ?

I'd probably check a bag with them in. Aspirin, chapstick with spf, maybe cheap sunglasses from the dollar store

Are you talking about welcome bags? If so, I would add small snacks like trail mix or granola bars, maybe snacks local to the destination, bottled water, a welcome note, and an itinerary if there's more going on than just wedding day events.

Some people even put in a map or local guide of things to do in the area

Honestly, you are courting trouble with Homeland Security if a quick check shows you have multiple containers of aspirin, or anything liquid or semi liquid, more than 1 person will use. Buy that stuff when you arrive at your destination. Or skip it. When security flags one item, even on a baggage check, they pull stuff for a couple.plete inspection. And you could arrive 2 hours early, and miss your plane still. They confiscate, they search outrageously when they want. Due nothing to give yourself a head ache with them .