Thanks to my readers, I have cracked the problem of finding white non-fluorescent paper, which I will post here for the benefit of future Google searchers. At first I tried some natural bond paper, and it didn't fluoresce, but it added too much yellow to the final product. I was just in the middle of playing with Photoshop to see if I could compensate, when Agesilaus said that this was a concern in archival and art photography and what I wanted was OBA-free paper. OBA is the term for a class of optical brighteners that fluoresce and are used in most papers, and because they can cause fading, artists and photographers create a market for OBA-free paper. It can be expensive, like 70 cents a sheet, but since I can put most all the signs and details I need on a sheet or two, that is no big deal. Here is one source, not surprisingly from the comments, a photography outlet.
PS - TJIC thought the scorpion thing was creepy. It sort of is, but it beats shoveling snow.