Thanks to swling.com & DXer Claudio Tagliabue via FB
November 3-5, 2017 Maybe 15010-15090 kHz, probably 6200-6400 kHz and 6800-6990 kHz
Of course, these were general frequency ranges used by pirates during prior Global HF Pirate weekends. Some stations will surely operate on frequencies and times outside of these ranges. In fact, the way conditions have been lately, frequencies at or below 15 MHz seem like they will be more effective for intercontinental broadcasting. These will be updated on the Hobby Broadcasting (http://hobbybroadcasting.blogspot.com/) blog as it happens and also check the loggings on HF Underground (https://www.hfunderground.com/).