Especially when i'm working on Live Production on location, i'm always thinking about where my ATEM setup would be. Sometimes you have to bring your own table, but here's an alternative option - a full 3 shelf Folding Portable Rack.

These racks are light enough to carry and fold down quickly to transport in your car. They setup just as fast without tools and is a good way of keeping your bags together and off the floor. The wheels make it easy to move gear about, and there's been times where i've even gone as far as using cable bike locks with my hardcases to ensure they don't wander off. I'm showing my Medium sized version, but the smaller version (only a few inches shorter) starts at around $40 dollars. They come in a variety of sizes, but for travel and to maintain a low center of gravity it's better to stick with the small to medium models with casters.

Portable Folding 3 Shelf Rack with Casters

If you're looking for a large space to work, they also have a folding desk setup as well.

Portable Folding Desk