We had to take out our mattresses. On the drivers side bed, we found some storage that we didn't know was there. I don't remember seeing anything about it on these forums, and if we hadn't removed our mattresses, we never would have seen it.
While we are talking undiscovered storage, some Axis/Vegas owners haven't found the long storage between the two front compartments. Great for a ladder, broom, anything long.
Also, in the 25.2 with the jack knife sofa, there is room under there for some things like a extra blanket or pillow. Just be careful around the water pump, valves and piping. Look under any RV with a jack knife sofa.
Bad decisions make great stories!