We weighed our fifth wheel on the way to the house (which had been sold) from the dealer - and then again every six months since hitting the road. The general rule of thumb over on the Escapees forum is about 1,000 lbs. per person for full-timers. We are a bit over that at about 2,300 - 2,400 lbs. for the two of us. Unless you have a toy hauler, most of the weight you load is from the trailer axles forward (i.e. under the bed, front closet, basement, LP tanks, front "tool" compartment, etc.). As a result, a lot of it ends up on the pin. We have to be very careful about not exceeding the rear axle or tire ratings on the truck. The trailer has the MOR/ryde independent suspension with two 7,000 lb. "axles" and load range G Sailun tires, so we don't have to worry about that part (thank goodness!).
Rob