Akoss Poo is coming, that's sure. In the end of August, I'll have my exams, so the earlier the better. My votes on the weekend:
1 August 4-6
2 August 11-13
3 July 28-30
4 August 18-20
The others are may not be good...
If the others are coming for more than 3 days, I'll come, too.