A friend cut a hole and made a chute with drawstring for an ac unit.
A friend cut a hole in the tent and duct taped foam around the ac unit.
A friend taped some flashing to the front of an ac unit. Formed it to fit a 4" dryer hose. Tied the end to the vented frame area in the top of the tent before placing the weather cover over it. Reformed the flashing for 2 hoses for 2 tents.
I've seen ac units sitting in the doorway of tents. The air has to pass through the screen and the weather flap has to stay open.
I've seen some of the newer tents made for an ac unit with elastic closer.
All of the ac units were placed on milk crates or small tables. All of the tents had a tarp over them to hold the cool in better.