Before i go investigating every nut/bolt is the trunk area and the back end springs/exhaust generally noisy when hitting bumps? i dont see any obvious culprit....
Check the rear shocks upper mounting; are they tight?
Before that, check to see if the spare hold down is tight; if spare has deflated, it will loosen.
i noticed the transport strap brackets are rubbing the leaf springs.... this should solve most of it. thanks
Bingo... that was it