[Libertas Omnium Maximus]

I was thinking of a week so that it would be guaranteed to include a weekend as well as weekdays, in case anybody had time commitments that made the weekend the only days when they could get here.

I couldn't agree more. The least amount of time I would recommend is six days. I don't think more than a week and a day is necessary however. If we go for six days, I think it would make the most sense to go Sun-Fri or Sat-Thru. Sunday is, to my knowledge, the day with the most people off.