5 years ago I partook in some drugs that I'm not AT ALL proud of.  Heroin, cocaine and crack.  (twice, three times, and twice) At the time I thought they would be a good 'experience.'  I also smoked pot, but gave that up as well after realizing how stupid it is, and how lazy it made me.  
I'm very much ashamed of the horrible judgment I used, and have since grown up a lot.  It's only been 5 years, true, but I'm a totally different person.  (I know I sound like a d*ck saying that, but it is true) 
I refuse to lie to anyone about my experiences, the thought of it makes me extremely uneasy.  I want to leave it all behind and become a soldier, but I'm afraid laying it all out on the drug sheet will make me ineligible.
Do recruiters assess these types of things on a personal basis, or dismiss one immediately after admitting such horrific drug usage?  I'm not addicted to any substance (except a cup of tea once a day) and don't have an addictive personality.  I'm bilingual, reasonably intelligent (or ridiculously stupid, one may pointedly argue) and I think I would make a good recruit.  Am I naive to dream of a future in the CF? Thanks for your time.