you have to back into place for many shows (American Adventure for one), and you must back onto the bus lifts and back into place for the spots on the bus many times. You also have to back out of those spots in very tight quarters fairly quickly.
If you use wheelchair seating for parades or shows like Illuminations you will have to take the canopy down, because it will block the view of those behind you.
You can call walker and ask for the dimensions of the shade, but it sounds like you will spend more time taking it on and off than anything, and my understanding is that it is difficult for it to come on and off....