I have some large stackable totes. I cut the side out of one. I nest another tote inside the one with the cutout and use it to carry a lot of small astronomy imaging items for the trip so the one with the cutout doesn't actually take up extra space in my truck.
The cutout tote is useful under sunlight so you can keep your laptop and screen out of the sun. It is also useful under darkness to minimize the light leak from your laptop screen.
I just ordered a 4x6 foot popup shade structure with partial shade back wall. I wanted a short shade structure for my table and chair near the mount. Useful to keep the heat down in the day and the back shade wall also keeps the light leak from the laptop screen from being seen from behind where I sit.