I have an olympus E-510 DSLR. On Nov 1, I will be moving from Maine to FL with two friends. On the way down (Assuming they are still open), we are planning to stop off at Luray Caverns. I don't remember much about that place on my first trip there 22 years ago, but I remember it being rather dark. I would love to get some pointers on shooting in that kind of lighting. The tour guides recommend high speed film and a flash, but it seems to me that I would get better shots without the flash. I want to capture the scene with the available lighting... not a flash.