7 pm is likely going to be a more convenient time and thus likely what will be chosen, but again, I am leaving the day and time open to the consensus of the players.
Would it be classified as Hack n'Slash? This particular module is a Halloween event, so I would come expecting more D&D survival horror than typical dungeon crawling hack n' slash. Come not only with a sharp axe, but your "Cap of Clear Thinking And Creative Problem Solving" and a pair of "Shoes of Fast Running". I'm sure that won't be a problem if you've experienced CoC.
That being said, this is a 6th level adventure and DCC RPG characters have plenty of power at their command at that level (perhaps equivalent to 10th level D&D characters) and there is sure to be plenty to fight your way thru.