I have a lot of these:
https://www.amazon.com/Samson-Technologies-SALTS50-LTS50-Laptop/dp/B00OZES766Samson LTS-50 (aka SALT50)
I stopped using my desks completely after getting them (I live glued to my laptops)---they are just super comfortable, as if you want you can tilt the keyboard down a bit (easier to type than flat) and set the height of the table just right for you. I added this 'clamp on shelf':
https://www.adorama.com/lasmt01.htmlto hold a couple small stacked interfaces (mixpre-6, mixpre-d). I also sometimes use that 'add on shelf' on the side of a mic stand to hold mixpres (though sometimes it's easier to just screw those into a clamp or magic arm and clamp them on)
I don't think it would hold a person, but I have put a 50lb speaker on it and that was OK. The cam clamps also have an inner adjustment with a screwdriver so if you want you can set them so they're VERY secure when locked down. Also, it has a pin system you can pop in to make sure it can't collapse when extended. They fold down pretty small, and the tables can be completely removed if you need it to pack into a briefcase.
They also come with a silicone pad that makes your laptop stick to it (it's not sticky, just has incredible friction)---you could knock the table over 60° and I doubt your laptop would fall (no need to strap your laptop on in case of clumsy passers by).
I personally would not put a full laptop onto an 'add-on-shelf' on your mic stand---you need something that can hold not only your (pretty light) laptop, but also your (not light) typing hands/arms. I'd be nervous to risk it even with my bigger 20+lb cap stands---don't want to drop a laptop and recorder/preamps and mics all in one fell swoop...