I think you should combine the black light idea with whoever had the lights in the bag idea. Mirror the inside of your bag, insert some black lights and your plastic will glow better than anyone out there
so I decided to give the glow plastic Idea a shot. I have the glow mrv that glows really well when charged witha blacklight. I got a glow wizard and a photon glow tracker off ebay. I also got a handheld blacklight that should be a pretty good quality here...
so now im thinking about lining my smaller bag with reflective material to increase the charging ability. All I can think of is aluminum foil, maybe polished with mothers mag and aluminum polish. the only other idea I had was sheet metal, as its more durable, but i dont really want to risk the cuts and whatnot that may be a problem with that. any better ideas? I know it may not work (the tests Ive done so far with my glow mrv and blacklight have been pretty promising), but I wanted to try a tracker anyway, can never have enough putters, and like to kill time trying new ideas
edit: as for the aluminum foil idea, I was thinking maybe adhering the foil to somehthing more durable like cardboard tiles or something.