We had a 2000 Dodge 3500, 5.9 V8 van for a few years. It was a fantastic van. I kinda wish we would have kept it. Nevertheless, the tow weight rating was something like 7600lbs. That's less than you might think for that type of a chassis. Heck, my old Suburban is 7200lbs. The vans are good for what you want to do though. The GVWR is still well over 8000 (8700-ish) pounds for the Dodges. So, you can safely carry your stuff and tow a trailer.
As a side note about the Dodges of that era. Our church had two identical 2500 vans. We sold them when they had over 400,000 miles on them and they were still running and driving great. The only reason we sold them was that the insurance company had an issue with hauling kids in them and said that mini buses were safer (rollover issues). So, we sold the vans and bought short buses. I don't know how far that chassis will go with good maintenance but I suspect it's a very long way.
