OK, What camper are you getting, What truck are you thinking about putting it on all three big names are close to the same but of course they could be upgraded. Where do you live that you'll be in deep snow? I think your saying it will be a daily driver as well as a camper carrier. Bloof is right in that there's to much generalization. You'll have to zero in on some thing for us.
With that said, I have a daily driver and have no problems with or without the camper and mine has every acc. in the world except air bags. It is a ruff ride with the camper off!
If it's a 4x4 it shouldn't have a problem in deep snow with or without the camper on. My Silverado dually with 4x4 took us everywhere we wanted to go in the north east winters for many years.
Weight limitations are specific to each and every camper. What ever your comfortable with.
I personally like the longer wheel base but I have never off roaded.
Mine is a mega cab and I can't live without it.
Good luck
Have you seen the price of diesal?