My second 16 foot long TT did not have a AC. The only place to put a Window Unit AC ( Or, Window Shaker as the OP called it ) would have been out the drivers side and I didn't what it hanging out of there while going down the road scaring people in the other lane. So I bought a compartment door from a RV salvage place. I mounted it in the drivers side. On the inside of the TT I made a shelf under the compartment door. While going down the road, or when AC was not needed, I just set the Window Unit AC on the shelf. After getting to the park I would just open the compartment door and set the AC in it. Worked like a charm.