I have used a pop up toilet tent to shelter my laptop while dark site imaging, which worked well. If you buy a larger one there is room enough for a small Coleman pop up kitchen cupboard and chair, which can be used as a workstation and storage (Has shelves). I still use the Coleman cupboard in my observatory today.
https://images.app.goo.gl/G8VD7LVXzUqPSvBc9