I would say that he was definetely trying to tell others not only what he went through but what all those people around him went through as well. I do wonder though, if perhaps he didnt start writing this novel with an intention of having it published but rather to get all he went through out of his body. Sometimes it helps getting things on paper or speaking with somebody about it.
I cant remember which page in the novel he writes this but i think it might help you out with this question.
"Never shall I forget that night, the first night in camp, which has turned my life into one long night, seven times cursed and seven times sealed. Never shall I forget that smoke. Never shall I forget the little faces of the children, whose bodies I saw turned into wreaths of smoke beneath a silent blue sky. Never shall I forget those flames which consumed my faith forever. Never shall I forget that nocturnal silence which deprived me, for all eternity, of the desire to live. Never shall I forget those moments which murdered my God and my soul and turned my dreams to dust. Never shall I forget these things, even if I am condemned to live as long as God Himself. Never." -Elie Wiesel "Night"
The Preface to Night has some wonderful insight on this question, so I would recommend reading that to gain greater understanding into Wiesel's purpose.