If your over by a bit, I'm sure the pucker factor that is built in over and above the sticker max will be more then enough to handle the load. And if your truck is a 5 seater, and it's just two of you, there's some spare cargo capacity available. Also add to that (or minus as the case is) the tailgate will be removed, shedding further weight.
But yeah, if you're a die-hard boondocker, nix the A/C. But as pointed out, at least get the wiring there would be smart.
Have you been given a wait time for your build? Last I heard NL's were gonna be next Nov.