Can you help TailsOfTrio cross the stream?

The tireless wolfsune travels with a bag full of mails alongside a red panda superior and a little mouse.
Red Panda is a very important person who delivers the first and only the first class mail. If left alongside a mailbag unatended, he'll surely start tossing everything out of there (ask Sune how he knows that), untill there's enough room to fit all the matters of importance in.
The little mouse on the other hand is a critter filled with curiocity. She likes to talk and spends most of the time reading the newspapers from the mailbag to have more conversation topics. The Red Panda doesn't speak with commonfolk, and if these two are left unatended together, mouse will probably steal one of his precious letters just to have something to read, never to return.

The wolfsune needs to bring both of them (and also the mailbag!) across a river, but can only carry one thing at a time.

What should the wolfsune do?