My systems are all vacuum-sealed (with a Food Saver) in anti-static bags, which are then wrapped with bubble wrap. I have them tightly packed in a lead-lined waterproof Pelican trunk, and buried in an undisclosed location in the back yard. I only play games via emulation, but I do so sparingly because I worry about my ROMs getting bit-rot from overuse. Mostly I just watch "Let's Play" videos on YouTube.