We're going to be in Poland for a conference this July, and I will be arriving in Krakow and ending up in Poznan where the conference is. We'll have between 5 and 7 days for tourist activities.
Tentatively, I'm thinking about two or three nights in Krakow, two in Wroclaw, and two pre-conference in Poznan. Should I spend more time or less time in any of these places--even if it means skipping Wroclaw? What are the "must sees?" And any recommendations on lodging?