Gentlemen,
Thank you both for responding and giving your input so quickly. As asked by Anacortes Army Guy, my GVWR is 7200, tongue weight is 930 lbs and yes the 5700(actually 5710) is the dry weight. Being it is the 3.0 Duramax, it's towing capacity is only 9300 lbs. The folks that sold it to us gave us a bunch of stuff(essentially we just have to add clothes) as well as a WDH (a Curt with thick bars) that weighs about 80 lbs.
I will be sure to take it to our local dump for the weight and check out those links on WDH and towing capacity. I will also use tow haul, the gear selector and adjust the brakes as suggested by voided3. I never thought of towing it with any water on board because in the past we've stopped for fuel and use the bathrooms. But that may be something to consider for future trips.
Thank you both again
smitty481