I recommend the 2 galvanized feed/oil pan/fireblanket method. The two pans will cost you under $10 total at a feed store or on eBay. The 5x5 welder's blanket will cost $30. Put the blanket down, flip one pan over and set the other on top for an elevated pan. Or you can cook on one, warm up around another. Of have a big white man fire.
One pan stores inside the other with the blanket and your screen inside that pan. You end up with this small package that fits nicely in an old dry bag with your tongs, heavy duty leather gloves, and some trash and rice bags. The whole set up will cost $50 and is a legit firepan for everywhere but the Grand Canyon. The ranger there told me it's too small, though it did meet the cubic inch requirements listed on their regs....
I don't think those grills cut it, they are usually much thinner and cheaper than they look in the picture. The galvanizer pans warp a little, but generally fit together for a long time. Just don't cook on them until you've burned them several times and the galvanizing finish is burned off. It's toxic I hear.