Do you know what your truck's gross vehicle weight rating
(GVWR) is? On a 2003, I'm not sure if there is going to be a sticker on the doorjamb or not- you might have to either look it up in a towing guide
or in your owners manual.
If you can also find axle weight ratings, that would be good. Especially for the rear axle.
And finally, the last thing you want to double-check is the tire load capacity. This one sucks a little because it's written in TINY print on the tire itself.
You had the truck loaded with 4300 + 4280 = 8,580 pounds.
Without having a separate weight of truck-only, we can't figure out your pin weight. The camper's weight is going to be the trailer axles + that pin weight.
When you do re-weigh, I suggest doing both weights at the same time. It can really mess with your numbers to have weights from 2 different time periods.