2008 Dodge Dakota 4WD Crew Cab Laramie Specifications-Vehix
I got 11,700 pounds from this site with the Laramie package.
If your camper does indeed weigh 6400 and you have a 700 pound tongue weight, you are at your max tongue weight (670 pounds)
As weighed you combine at 12,060 pounds (overloaded here too by 360 pounds). Subtract the 6400 pound camper and your truck weighs 5660 pounds, under your max gross of 6010.
Since you don't mention it I assume that you weighed with your tow bars in place. This could be hiding your true tongue weight by shifting it to your camper's wheels and your truck's front axle. You would need to weigh again without the bars connected to be sure.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW