Compugeek,
The paper most have talked about is the standard RITR paper that has been around for years. They have developed two new papers that are for copying. I have not yet used the ink-jet paper, but the paper for copiers works well (even for underwater forms). The inkjet paper is described by Darling (the maker) for use as you described. I am not sure I would expect it to work underwater, but their products have always been first rate and I expect no difference here.
I hope to try some this winter, if you don't have an answer by then, I will post my results.
The best,
Jerry Fountain