Portable Standing Desk

I've wanted to use my keyboards outside for a little bit. The seed of the idea was struggling to work with my mobile office in a "workspace" at an airbnb with only a couple inches of countertop at a very uncomfy height. What if I could just bring my desk with me? I experimented with just buying a laptop/projector tray and sticking it on a lightstand I had lying around. Very wobbly. I eventually…