Unfortunately, I did not get to attend any boot-camp trainings as I made my forray into the database world.

That being said, I am a strong advocate in favour of boot-camp trainings ranging anywhere from 4 - 12 weeks (depending upon the complexity of the job at hand - a basic developer/administrator would not need more than 4 weeks to become productive, whereas a full-scale production DBA should need a higher period in the camp).