Sniffing Out the Perpetrator

The tone of Brann's note suggests he meant to bury something with the note, maybe a pack of some kind. You're sure this was all you found?$B$BOkay, I'm going to have you take one of these frosthounds with you. The frostborn use them for tracking. Bring it to the destroyed camp and let it get Brann's scent.$B$BIt should at least lead you to the location of those missing possessions, and if we're lucky, Brann himself.