I have a 49 key controller on a keyboard trey, which I tuck under the desk when not in use. I do have a big 88 key, with tons of knobs and sliders, but it ended up in the storage closet. I prefer the convenience of the 49.
I tend to keep things very tidy - I don't work well in clutter.
In fact, I keep on removing gear and storing it away, as you can see in this pic taken last week or so...
The desk is a simple office desk found on Amazon. Work great for my purpose.