Well, I broke down and am giving this a try. Doing a 2.5 gallon batch in a Mr. Beer keg. Oh my! Temperature corrected OG is 1.134.
Used 5 cans concentrate, 3 lemonade, 1 limeade, 1 cranberry, 5lbs sugar and EC-1118. Yeast seems to have started ok so I guess we will see.