Yea, I have thought about that. But realistically, I'm thinking within the next 10 years give or take, I'll be able to copy these disks to a new medium, like blue ray or something not so volatile. Point being, I'm looking for something to last, but it doesn't have to last my entire life.
And yes, C:\Saw is correct, it is static data, so I'll only need to back it up once, and store it in a low humidity low light container I've yet to find. :p
The problem is, there doesn't seem to be any conclusive evidence as to how long disks last (I know this also depends on the manufacturer).