Have you figured this one out yet? Arduino might be what you're looking for.
Ok - I FINALLY figured out how 64 LEDs can be independently controlled with only 16 outputs. I could do inputs the same way. Arduino looks like the ticket - one $35 board can control 64 LEDs or 64 inputs, or if I take the leap and build a board with its own LED controller (MAX7219?) it could handle 128 LEDs and not quite as many inputs, but I don't necessarily need as many of those. I might actually be able to pull this off!
Later in the day, after fixing my mother's lunch, I meantioned this experiment to her. She asked if I could use her kerosene supply. Out in her garage was a 5 gallon can half full. Great. There were also 3 marine deep-cycle starting batteries. Great. the batteries took 12 volt charge. I already have several cigarette lighter plug device I can use in my tent: sixpack refrigerator , spotlight, fan, and radio/ TV. I suppose with an inverter I could use 110 volt appliances. I saw one in an auto parts store that puts out 2500 watts. I plan to hook up my storage batteries in parallel to an inverter, then to hotplate or skillet or coffeepot. Yeah! Electric kitchen...now we're cooking with gas- er- batteries! I have a solar battery charger to top off my bank. I only intend to cook once a day- or less. Man, I'm pumped now...can't wait to go. I think I might build my own lampstand ,similar to the Lamplighters. 
