We have an Outback 16.49.1 with an Annex. When I picked it up (1 July) I was told that the annex would fit under the table. On our old van the annex would go under the bed. Went straight down to a canvas place and they made up 2 bags (one for long wall, and one for side walls) that are half hight and the walls are rolled up. They then fit through the side entry boot. This means that if we do not set up the Annex we do not need to move it and it can be accessed without disturbing inside.
Cheers
Steve