I do not, but yeah, having something like that would probably be useful for a lot of people doing a set up something like this.

The room I am in is a bit too small to also fit something like that without it being more of a hassle than a help overall, and it would probably get hung up on the carpeting, and I'm basically at 10% strength capacity in one arm/wrist/hand, so... it would probably be painful and awkward to move around.

I just have a smaller nightstand table.

But, my bed is a queen, so, there's usually enough room to just have a kind of 'stuff i need to grab fairly frequently' zone, like a staging area.