[emoji849] Way more than once I let rampers (good rampers too) load me up with the weights I wanted only to find I was in a world of shit once airborne. I'd flog through the air heavier than shit, then land and add up the weight once I got where I was going, finding I was hundreds of pounds over my acceptable gross due to a math error.
Problem was the nature of the stuff sent bypass mail. Heavy goes in first, then all the rest of the available room gets taken up with chips, mail bags, and odds and ends of crap for your village agents from the store. There was no way to tell by looking, and even if the tail was on the ground after loading, you were in CG if you could pick the tail up by hand or when firing up the engine.
I always flew full fuel out of Kotz, Barrow, and Deadhorse. On paper I had fuel for the trip ETE and reserve to make the W&B look legal, but in reality I carried max weight, and figured max fuel as a little safety net just between me and my airplane to know about. There just aren't any alternates close enough to help you if you get stuck in a hold for wx, and no guarantee your alternate isn't FUBAR by the time you get there.
A Sled flys a whole lot better a few hundred pounds over gross than it flys a few hundred pounds shy of fuel. And lots of gas keeps a guy from getting dumb and scared before he has to get dumb and scared.
Gump