I have a 27bh but no slide so it's dry weight is in the low 4,000s and it has about 2500 lbs cargo capacity. On a good day I might be hauling an extra 800lbs of gear but not really likely and I honesty don't really care, nor have I ever weighed it.
I tow it with a 3/4 ton Suburban and have done so for years. I don't know if you have considered a 3/4 ton (that would be a K2500 4x4 or C2500 4x2) I run the E rated tires and when not towing I lower pressure to 40 front and 50 rear per GMC's recommendation. This is also our road trip vehicle and has been for the last 15 years. The ride is decent and has never bothered me nor the kids.
If you haven't already you might look and see if you can get a bit more cargo capacity with a 2500 and then buy with the reassurance that you're not going to overload anything. Another way to spot a 2500 is they have 8 lug nuts per wheel instead of 6 lug nuts on the 1/2 tons.
