Spare Tire Mount Solutions?
Hitch mount (easy/peasy)
Front receiver hitch mount ( in front of grille - yes you can get enough air flow ). Benefit is utilizing front axle which often has capacity to "spare".
Roof (yikes, heavy, but bonus of being out of the way.
My last class c had it mounted on the rear wall attached to a steel stud.
My current rig has it on the rear bumper with a continental style mount that drops down. (I know you don't like that)
If all else fails, there is always the trunk monkey from one of our local dealers.
History: '08 View, '05 Chinook, '01 Jamboree 24D, '78 Apache Popup, 81 Komfort Tlr,
84 Mazda B2000 'w canopy,
Tent from wedding shower in '96