Why is CWR so much less than GAWR? I am confused :(

The CWR likely assumes you have a 150 pound person in each seat position in the truck. If this is an ext. cab model that adds up to a lot of weight. If you don't plan to carry that many people you can haul more camper.
Either way, making a 1500 truck properly haul a truck camper is problematic. They just aren't built with much payload. In fact, most truck campers will overload a lot of 2500 trucks when you figure in food, water, propane, batteries, passengers, gear, etc.
My advice would be to load the truck with the normal passenger load you would have for camping, remove the tailgate and fill the gas tank. Now go weigh the truck at a scale and note the rear axle weight. Subtract this weight from the RAWR. The result is how much weight you can haul. This will likely be over your truck's GVWR. This is fairly normal for people hauling TC but generates lots of negative comments form others who don't agree with the practice.
(Just see what follows.)

I am not saying your wrong but I question how Starcraft truck camper lists a "wet" weight of 2442..

I believe most people call the wet weight meaning of their camper after they are loaded and ready to travel.

Just to be clear, I am talking about that extra battery, food in the Fridge, clothes, etc.

To me, that's the true wet weight, but others will disagree.

So what I am saying is expect this camper to be heavier than you expect.

Paul

I think you need to check your numbers again. Your 1/2 ton truck can't have a rear axle rating of only 3150, that number is too low. If CWR means Cargo Wieght Rating then that is the number the manufacture recommends you do not exceed and ~1500# for a half ton seems about right. The absolute maximum you can load is GAWR minus actual wieght on the axle prior to loading the camper.

2400# on a half ton is not going to work. 2400# will likely work on a modern 3/4 ton but might be too much even for an older 3/4 ton.