Nick,
I was able to remove the plywood flooring without removing the bulkhead, but it was tough. I had two advantages: 1) I removed the whole floor and did this piece last. This gave me a little more wiggle room. 2) The flooring was water damaged and delaminating, so it had a bit of flex to it, and I wasn't too worried about damaging it as I was going to replace it. (that was 4 years and over 3000nm ago, and I still haven't done it!).
One thing I remember is that I had to remove the the storage hatch under the stove, the water foot pump, and the lower brackets for the ladder, in order to lift it enough to begin sliding it out.