That weight is without a trailer. Just my truck and camper.
I tow a small single jet ski trailer with a kayak instead of a jet ski on it. I also tow a 2-rail dirt bike trailer with one dirt bike on it at times. Neither one weighs more than 50 pounds tongue weight or 500 pounds total weight.
Eventually I want to flat-tow a Suzuki Samurai or some such.
Let's see if I can figure out why it's so heavy. In the camper is a label with the weight of my particular camper with it's accessories as it left the factory. That label states the camper weighs 3190 lbs with a full tank of water and propane tanks full. It also says options that weigh less than 8 pounds were not tallied and could add up to as much as another 150 pounds. So, call the camper 3300 pounds from the factory.
I've added a bunch of stuff to my truck;
Hellwig Big Wig sway bar 50 pounds
Hellwig LP-35 Heavy duty leaf kit 75 pounds
Hellwig LP-35 Mounting hardware kit 25 pounds
Torklift front and rear frame camper tie downs 20 pounds
Torklift Superhitch 50 pounds
Torklift 36" Supertruss 50 pounds
Air bags 35 pounds
Rickson 19.5" wheels 250 pounds
Toyo 19.5" tires 330 pounds
Front receiver hitch 50 pounds
Front push bar/driving lights 50 pounds
running boards 80 pounds
That totals 1065 pounds. But need to subtract the stock wheels and tires. I'd have to guess those at 80 pounds each, based on how heavy my spare, which is stock feels. So, call it 750 pounds of truck mods.
Camper..................3300 pounds
Truck Accessories.. 750 pounds
Me and DW............ 400 pounds (with cab stuff; water/treats/GPS, phones, etc..
Camper loaded gear. 250 pounds
Batteries................ 150 pounds (sticker in camper did not include batteries)
------------------------
Subtotal.................4800 pounds
If this is accurate, then my truck weighs about 7360 pounds. I bet this is very close. Checking around on the web forums for Dodge diesel trucks, my year, they all over 7,000 pounds minimum and 7600 pounds with driver on the scale.
For anyone wanting to guess their outfitted camper weight, a good rule of thumb is what ever the manufacturer said it weighed at delivery PLUS 1000 pounds. I'm right there. (Minus me and DW. Just the camper ready to go)