Yeah, let's hear it for the mailbox run!
I use my bike for mailbox runs also, about 3 houses down the street.
Sometimes I'm gone for 1/2 hour. Wife and kid ask me what happened . . . out cruising a few twisty turns past the edge of the neighborhood. I shove the mail in the enduro bags on the TW. Very effective.
Looks like a good camping trip with the family.