The theatre festival is usually in the 2 last weeks of July, and the first week of august. There are over 300 plays,from 10 am until 12 pm (beginning of the last plays), plus lots of street shows, like people advertising for their plays. It's lot of people, meeting, sounds, and it's really great. There are also some great names playing (last year, I went to see Kristin Scott Thomas, with Lambert Wilson). It would be great to see you there. Say me when you come (if you come), and I'll try to find as much rooms in Avignon as you will need.
Congratulations to the new parents, and good luck for all trips, exams, et caetera...

Grégoire