To make a corny keg portable would it work to just put it into a 10 gallon cooler (like are used for mashing) with some ice, and then hang the CO2 off the side?
I've done it several times. The keg is taller than the cooler, so I just fill with as much ice as possible then roll a towel and stuff it in the top of the cooler around the keg.
Awesome. Just saying, it pays to ask around for things sometimes. I mentioned to a guy that I've been looking for a 10gal cooler, and he's just going to give me the one sitting in his garage he doesn't use any more. So, I was thinking not only about a MLT but also a portable keg cooler.