Normally I only hit the ID at the end of the game, to kill Filk and get the Sceptre (if I'm doing that stuff).

I was wondering though, if going into the ID before getting the Filk quest mattered. If say I kill the usual Beggar to make him spawn on level 1. If I go through the ID and then come back when I have the quest to kill Filk, will I still be able to?