2021 tour: all four grim “Reinhardt” sites and three massive bunker-ruin sites, including Hitler’s HQ, the Wolf’s Lair
No further details yet available.
Irving has hosted several of these tours before, one every few years, starting with his own first-time visits in 2007.
In March 2007, he recorded this in his public journal, A Radical's Diary:
I don't like Poland, as the following entries will betray. This is my first visit to the country [...]
As for the rest of the entries we have from David Irving's first visit to these sites in 2007, he was long trying to take a publicly neutral line by this time (2007); if you read them, you 'll see plenty of subtle clues that he did not believe the claims and treated them at great distance; he tactically refrains from saying explicitly that he disbelieves and is a subtle-enough writer to drop clues. He has been banned from countries too often and I presume he does not want to get banned from Poland. All the same, he linked at the bottom of that same 2007 entry to the One Third of the Holocaust video series.