The filter sounds very interesting, however, I think that on this trip I will be taking my cheap CPL from Polaroid and trying it out since I've only used it a couple of times before. Once, with a roll of Velvia 100 loaded to my EOS Elan 7, walking around NYC during the day. It really accentuated the blue in the sky, which I would love to do from a high point, while the colored leaves are below. I think that if shot at the right angle, it could further increase the "pop" factor of the colors against the dark blue.
The second time I used was using B&W and I didn't like it since once I scanned it made my pictures look extremely grainy. Not sure if perhaps is a scanner issue or maybe the Tmax 100 roll wasn't 100% but I was definitely not satisfied with the results.