http://flames.nhl.com/club/news.htm?id=677255
Here is last year's schedule.
Day 1: Testing
Day 2 and 3: Skill Development
Day 4: Scrimmage
Day 5: Skill Development
Day 6: Scrimmage
Day 7: Skill Development
So I would guess the scrimmages will be
Monday, July 7th
10am - 1:30pm
and
Wednesday, July 9th
10am - 12:00pm