Lol I had another crazy stoned idea.
What if you first vented the cab/tent into a closed rubbermaid stuffed with frozen watterbottles to cool the air and create condensation, then further vented that air into an open rubbermaid which collected condensation and released the (now cooler) air? Does that make sense?
So it would go tent -> exhaust into closed rubbermaid (ice chamber) -> exhaust that into open rubbermaid (collect water and empty this as needed). Of course you'd need a constant supply of frozen waterbottles, but thats easy enough. And you'd have to empty both out all the time which would get a bit annoying. Just wondering if this would even work though, I guess I'm more curious then anything.