There is an article on structuring at:
http://support.visualanalytics.com/t...e12/VLNews.cfm
The critical statement is "Thus, "structuring" financial transactions to avoid filing requirements is a form of money laundering and subject to penalties and forfeitures under the current laws and regulations." so since it is under 10k and you are not trying to avoid filing anything, becasue nothing would be filed, you are perfectly OK to deposit all 6k