With up to 40 people involved, there will not be a time that is convenient for everyone. I will admit 5:20 was a dumb choice. But only because it would not have allowed for a Thunderstorm delay. If weather played a factor with a late start, we'd have been forced to, at worse, drop the round, or at best, postpone until Sunday morning. Thus the move to 3:00. I prefer not to go any earlier because midday 2-4 hour events have this strange way of blocking the entire day.
As long as I am the facilitator of the Team Challenge it will be a 3 round event. That was my proposed format. I reluctantly made an adjustment to 2 rounds last year as an accommodation to Cheif's fans. One idea that can be considered for future Team Challenges is squeezing all 3 rounds into one day. June scheduling would make it possible.