BWI standard room rack rate for 2006 is $305 per night plus tax.
AAA should lower this by 15% to around $259 plus tax.
In 2005 the Florida resident discount for BWI was $234 plus tax, AP rates are usually the same as Florida resident, if available.
You said you are trying to 'get a "great" deal' - what does "great" mean to you?
Michael