I'm posting because this solution was so easy and is working even better than I'd hoped with my three large-ish dogs.
Step 1: Removed the rear seats and the plastic storage bin.
Step 2: Buy a $50 4 inch firm foam slab from Amazon...
Wanted to share my notes from towing a big trailer with the base manual.
First, the combination of gearing and engine performance isn't ideal for towing. I found myself only using 3rd and 4th gear, and the pentastar seems tuned for horsepower and not torque. It's fun without a trailer, but...