I do not know enough about your background, but if you have worked in positions where you can emphasize your writing/communication skills, and if you spend a great deal of time on your application essays, these will both be able to help mitigate concerns an admissions team has about your AWA score.
Here is some school specific advice for the programs you are considering:
Wharton: http://www.stacyblackman.com/business-s ... n-wharton/
Chicago Booth: http://www.stacyblackman.com/business-s ... ago-booth/
Conrad and the Stacy Blackman
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MBA blogger, US News and Author, The MBA Application Roadmap