AC works great at night . In daytime in sunshine it's not so great. I set my tent up facing either N or S. After I get tent set up I lay a tarp over the tent to help cover the screen air vent in the roof and the air gaps around the side windows. Seal it up as best as possible. Then I take a big tarp (mine's maybe 12 X 20ft)and throw it over the tent , use a couple of adjustable poles , one in front, one in back to lift the tarp just above the tent and stake down the long sides east and west to make an A frame type shade to keep the sun off the tent all day.
The front of the AC unit MUST be inside the tent to draw the humidity from inside. You cannot sit the unit outside and run a ducted hose from the cold air disharge into the tent. It won't remove the humidity. Also the tent, unlike a house, won't hold the cold when you open the door to go in and out. In the daytime it is fine to go in and take a nap, provided you go in and stay in but a simple door opening loses all the cool dry air and it takes a few minutes to recover. Just my 2 cents worth on the subject....Happy Fishin, Fred