If he poops as much as my bird does, the poop pouch would fill up and then some in nine hours, especially if you use one of the disposable pads (which take up a lot of room in the poop pouch). You would have to take the suit off and empty out the poop pouch, then put it back on, which I imagine would be a hassle while in a vehicle and a potential danger if your bird struggles and potentially flies in the car to get away from the suit (I don't know how your bird reacts to it, but that is what mine does, and its a definite possibility). What kind of carrier do you have? Adding perches, if possible, would help with his stability issues in the carrier, or putting some kind of blanket on the inside bottom so he doesn't slip and slide. The carrier would be the better alternative for such a long ride.