Have a longbed truck.........Fully enclosed self contained 4K gen in front of bed and an aux low profile behind hitch.
Still room for other stuff.
Lots of room if just hitch in bed
As for hitch........we FTd so hitch stayed in truck. Now it hangs from 5th wheel king pin until needed (just rails in bed)
IF...IF I was doing it now----probably go with a turn over and have clean bed. MAYBE???
FW....stable tow but tracks different then TT (tracks inside when turning)
Both easy to back up.....just different pivot point so different maneuvering. FW slower to react to steering input but then quicker response when it reacts
FW to me..much easier hitch/unhitching. I can SEE king pin and place it right into hitch w/o eyes/help
FW....more storage
TT.......less steps
TT.......shorter height
TT.......more TT can be towed vs FW if truck payload is limited
FW vs TT..........floorplan and personal choice BOTH work very well