Would you read previous weight topics, you would find that the "paper weight ratings" are taxable ratings, having very loose connection with actual truck capabilities.
Your rear tires (the weakest point) have 7280 lb carrying capacity. Actual weight 3040 gives you 4240lb you can put on your rear axle.
Now COG comes to mind. When each camper will have specific data, roughly you can assume that
-12' camper will put 110% of its weight on rear axle with 8' bed
-10' camper will do 90-100%
-8' camper will do 70-90%
Front axle overload with TC is never an issue.