You'll be over the payload. I'd weigh the truck and find out how much rear weight you have before hitting rear GAWR. I'd also look at what your tire load capacities are.
This camper is likely going to have 1,000+ pounds
The weight of your WDH itself is going to come off of your payload, as well (but some of that will be made up by the weight shifted back to the trailer axles).
If you have P-rated tires on it, the common recommendation that I read here is strongly think about upgrading to LT tires.