I have a younger scout who put all the stickers out yesterday morning. So the kids are fifth grade and younger.
We were in a neighborhood where the houses average 1+ acre, so they are spread out. Very little traffic.
When we went down dead end side streets, we drove to the end and then had the kids each take a side of the street and run mailbox to mailbox. We had the doors to the mini van open and drove very slowly in case they needed to hop in. On the main neighborhood road we closed the doors.
Some of the others cars in our group did have kids in the trunks and they hopped out.
Honestly it felt completely safe, even with the younger kids. But it wasn’t a busy neighborhood.