Yes, the rumour about Fred Haise actually came from Sy Liebergot, who had actually spoken to Freddo about this very matter. That's got to be a pretty reliable source.
Fred Haise is in UK near the time as he is to address The West Yorkshire Astronomical Society on October 10th.
Hey Folks, I asked Freddo Haise and here is his reply: "The rumor must have been started to boost attendance. I am not going and have not heard that Jim is going to this one. I do plan to support one (the first) that the ASF itself is sponsoring in November."
Sy Liebergot
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