It would be worthwhile to consider a TT instead of a 5th wheel. You can easily stay with the 1/2 ton pickup and you retain full use of the bed.
I see many people with travel trailers in tow who are free to carry ATV's snowmobiles, motorcycles, kayaks, canoes, etc. using the pickup. With a 5th wheel trailer they would have to leave these toys at home.
In the past it was easier to hitch up a 5th wheel but with a rear view camera I can backup my truck so the receiver ball is within 4 inches of the trailer tongue with no outside assistance. My truck has the factory camera that is incorporated in the handle for the tailgate and this location is perfect for looking back and down at the hitch location.