Try parking your boat trailer when there are JACK-AZZEZ that can't park in the designated parking area with your Dually. Then try to back out without hitting another trailer when they are jammed next to your trailer.
My 01 has an empty bed that I can haul what I want when I want without removing my big toolbox and hitch.
Sorry it does NOT hurt a darn thing for my DRW to set for 6 months during the Summer, nor my 01 to set for 6 months during the Winter when I head South.
No extra maintenance as maintenance is all about miles.
Sure the "Storage" Insurance is an expense but having a truck I don't have to worry about damaging it or having someone damaging it is worth a lot to me.