Woohooo, the rvnut weight cops are out in full force with attitude!
Way to go boys! We’re into the dually thing and you’ll be hung at sunrise with a new rope if you disobey the sticker! On page 1 no less.
To the OP, there are volumes of discussions on this forum on this exact topic. Plenty to form your own opinion and plan of action.
Good luck buddy......and that salesman was also full of ____. Not because your truck isn’t likely far more capable than the mighty sticker, but because the front axle weight rating plays very very little into most axle weight equations as it’s rare that a truck camper adds a significant amount of weight to the front axle. Really only happens with short bed capable campers on long bed trucks. And even then it’s situationally dependent on how it’s loaded.