What do you think about this author saying they don't know where the other 932 bodies are!! I cannot believe that...they would have to have counted the bodies hundreds and hundreds of years ago. Is this guy smoking weed?
Well, pretty much the authoritative basis they have for the story of the whole Masada siege is Josephus. Finding evidence of bodies after 2000 years would be tough, but the desert does preserve things.
I think there is much archeology still to be done to uncover more clues confirming (or raising questions about) Josephus' account. Finding the 11 "markers" with names does seem to confirm a key component of the story, the final lottery of men to see who would kill the final survivors and then himself. Technically there was only one suicide at Masada ... the last swordsman standing.