Well, Chase, rounds for 35 point events last on average 87 minutes, assuming of course that at least one game goes to time. That is 348 minutes, or 5 hours and 48 minutes. Factor in at least a 10 minute break between round, + 45 minutes for Lunch and that is another Hour and 5 minutes, reaching 6 hours and 53 minutes. Add in ~half hour for adding things up and awards, and you end up at 7:30. Which is the primary reason why I did not attend. I would have had to drop after the third round, which is unfair to everyone else.
I would plan on Plainville Steamrollers going AT LEAST 4 rounds from here on out. As you have more players and therefore more games, it is increasingly more likely that at least one game will go to time in each round. My personal preference is not to go as late on Sundays vs. Saturdays. But that is just me.