More on IR film....

As noted above most, BW has some sensitivity to IR. If you can't get hold of an IR filter, a deep red one does not a bad job. Of course, the easiest way to filter out the visible light is to wait until it gets dark.

Ahh, the joy of photography at night! lugging a tripod about, and setting up gear in the dark, nad normally the cold as well.

Johninkansas, I've got a Nikon DSLR, so will try and borrow an IR filter. It should give a reasonable idea of how sensitive they can be to IR.