Here is some real numbers for a 2015 WC 840 on a 2006 Quad Cab, Cummins, SRW 8' bed.
truck full of fuel, nobody in truck.
Front 4080
rear 2900
Now with camper on, full of fuel, full of water, and food for weekend.
2 full propane tanks. WC has AC on it.
Front 4540
Rear 5760
Now my truck is an 8' bed and the Center of Gravity of camper added 450 lbs to front axle.
on your megacab with the short bed I don't know how much that will change.
This shows my camper weight was 3320 lbs.
my Truck Gross weight was 10300, but I think the weight sticker on door said 9900 lbs max,so yes, I was over weight.
And this was with nobody in the truck.