Ah... well, I can start the quests earlier, honestly. Also, I seldom actually go all four hours... I always try and keep my quests between two and three hours in length.
I had to move the quest from last week for lack of turnout, and it's looking like I may have to again. If I need to alter the time of the quest to accommodate more dwarven characters, let me know. That said, I know some people are just out of town/unavailable due to summer-time fun, so I'm not in any real hurry.