Newbie Here! - Would Love Some General Info/Help!

Man, y'all are awesome! This is exactly the type of info I was looking for. I will definitely be buying a used camper and it would just be one other person and me. And a shower/bathroom definitely needs to be part of the deal. That being said, I don't mind adding the overload spring which I believe is the only difference between the 2500's and the 3500's in my truck make/year.