Summer value season - 1st week or 2nd week?

[Abibaby]

We are getting ready to book for the summer value season in 2011 - is there a huge difference in crowds from the first week of value season (8/174-8/20) compared to the second week (8/21-8/27)

 

[Goofy4]

There are some days where the numbers looks significantly lower: http://www.touringplans.com/tp2/UG2_index.php?PageID=14