This is a very crucial question for revisionists to answer. As leading researcher Carlo Mattogno maintains:
Since Treblinka was much too small to be able to accommodate the large number of Jews deported there at the same time, the transit camp thesis is, in fact, the single plausible alternative to the conventional picture of the extermination camp. Tertium non datur - no third possibility is given.
Unfortunately, Mattogno is not able to meet this challenge.
Greg Gerdes similarly maintains from his NAFCASH website:
THE TRUTH – Treblinka was a transit camp and the so called gas chambers were, in reality, DELOUSING FACILITIES designed to protect the health and prolong the lives of the shameless liars who fraudulently claimed to be the victims of a genocidal extermination program. Remember, there are only two options: extermination center (for those who believe in magic) or transit camp (for those who believe in the scientific method). There is no third option and only one truth.
Yet no names are given.
I'd even be willing to accept evidence of transports travelling from Treblinka to a specified resettlement area (no need for specific names). Surely this challenge is much easier than the similar one that Bradley Smith poses to Holocaust traditionalists, as the people in question would be alive (somewhere), and leave a much larger trace than any silent and cremated corpse.
Perhaps some witness testimony of the resettlement? Post-war memoirs of life in the newly established lands?
I'd be interested to see what everyone has to offer.