Spoilers: Two low levels or even a solo low level character with a merc may do this if you are patient. High levels can solo this without any issues, so it can happen easily that you show up at the right time, and someone takes the mob before you have a chance. Just be patient. In two hours "game time" the quest giver will be back. Don't talk to him if you see others around. If you did talk to him and someone took the mob, simplest is to delete the quest, go back to the tavern and talk to the professor to restart the quest. Then go back to the field. If you are level 30, chrono to level 20 and you will survive this if you are healer + any other class. Not saying it will be easy, but you can do it. If you have to wait until nightfall again, you could always work on gnoll slayer or Firemyst gully while you wait. This is the only quest that takes a bit of finesse, but usually drops some exquisite loot that's useable at low levels.
This article refers to events, personae and activities only present in-game during the annual Nights of the Dead festivities, which come to Norrath each year from (roughly) mid- to late-October through to early- to mid-November.