I wouldn't trust any weight until you get to the scale. From a practical standpoint, any camper with all options at max length is going to be really heavy. I compared a bunch a few years ago. It seemed to me that the following was pretty close for round numbers.
slide - 250-500 lbs
1 ft - 250-500 lbs
Go from 9 1/2 to 11 1/2 and add three slides, and you've added up to 2500 lbs over the 9 1/2 with zero slides. Or, like mine, it "says" 3571 on the plate. I can't say I've worried about if that is the real dry or not. My Host had literally every option at that time for the 9 1/2 Rainier Double Slide including the dinette bunk.
Any newer DRW will probably be fine. After that, you go up to 450/550 if you want better brakes and other options that the bigger trucks have. I do know that I'm under my 14500 GVWR at what I'd consider my heaviest on one of my longest trips to Yellowstone with full tanks all around and I started with 60 gallons of water and that was before I dumped.