Camper weight and 4WD

I really wish I had thought about this earlier concidering I'm supposed to look at the truck today. I have the opportunity to buy a 1999 F350 dually v10 5 speed 4x4. I was excited about the 4x4 until after some late night reading that I would have to subtract the weight of the 4x4 from my max cargo weight. The reason for the dually was to be able to get a heavier camper (1-2 slides). Looks like the 4x4 defeats that purpose. Anyone out there care to weigh in. Pun intended. ??

If approximately 400+/- pounds is going to make or break your truck's ability to carry the camper you want you need to re-evaluate either the truck to buy or the camper. The dually should be adequate for most campers in the 4000+/- pound range. Check into the GVWR of the truck and what it's base weight is and that is what is left for everything else including the camper and people, etc. Look at the door post for that information. The gas engine is much lighter than the diesel so you have that going for you with this truck.