Where do RV's go to die?

stripped down sold for parts and the metal is sold for scrap

Hunter special is a common end game but probably not the majority.

I suspect a lot just wind up in back yards/farmers fields rotting away until the house get's torn apart and goes to the land fill. The frame and running gear would likely be taken by a scrap yard.

I do wonder if scrap yards favor aluminum sided over fiberglass. Scrap fiberglass siding has no value. The aluminum is quite valuable.

Depending on the damage, there probably is a market for a lot of the hurricane RV's appliances. If the flooding went say 4-5' deep, the floor is probably trashed but air/con is probably fine and the stove and fridge might be fine depending on how high and for how long the the flooding went. Furnace & hot water heater being down low likely won't fare as well.

There is a huge salvage yard for RV's near Carthage, Missouri. Everything from diesel engines to inverters.

There aren't many usable parts in a totaled RV. Appliances and water heater. maybe the windows.
Most are probably landfill.
MH should have a good engine and running gear which is salvagable.