Assuming you are in a double queen room, it should fit fine up against the air conditioner/window. There is a chair there that folds out into a small bed. So, assuming you are not folding out that chair the ECV should fit fine.
If you look at the picture of the double queen room, the ECV would basically sit between the bed and the window - where the photographer is standing:
My MIL stayed there and had an ECV and she would call the bell desk and have them come up and get it and take it downstairs until the morning then they would bring it back. She tipped $5 each time and they were pleasant and perfectly willing to do it for 2 days.