The hardcase is small enough and less than personal item size limits 8 in. x 14 in. x 18 in. Besides this is something not eligible for check in luggage due to Lithium batteries.
The biggest worry is that you cannot manually switch to atti mode.
Because of this when launching or catching, if the boat is moving, as soon as you start up or grab the drone, it will fight against the movement, attempting to hold position.
You...
Forget the controller.
The original image files are saved to the SD card in your drone or the internal storage in the drone.
It quick and simple to either pop the card, put it in a $3 USB adapter and put that in your computer ...
or
For internal...