sissi, as noted in my post, the John Takes Two Walks story came from PMPT. I've never heard that anyone present refuted it, including the Ramseys.
Regarding a card Bill McReynolds wrote to JonBenet, the info can be found on page 30 of Judge Carnes's order in Wolf vs Ramsey:
Another purported lead was Bill McReynolds, who portrayed Santa Claus at a Christmas Party at defendants' home in December 1996, whose wife had written a play about a young girl held captive in a basement, whose daughter had been kidnapped and sexually assaulted twenty-two years to the day before JonBenet's death, and who had written a card to JonBenet that was found in her trash can after the murder.