What Can I tow?
I tow a 23' Safari Airstream with no problem. The above site helped me to understand what I could tow based on my wheel base length (just over 122,), and, how to use weight calculations when loading up your trailer.
Watch out, in most states, if you are involved in an accident and it has been determined that you exceeded your vehicle's towing limits, your insurance can deny your claims and you can be prosecuted.
Hope this helps.