What is most weight you guys haul with a F250?

Go to a dealer and check the yellow and white sticker inside the driver's door of other F250 diesel limited trims.

I bet you have about 1800 - 2000# payload. That's going to mean you'll need to shop for a pretty small 5er (maybe one of the "half ton series models some make) if you want to stay under that GVWR limit.