This sounds painfully simliar to a stunt my friend tried last year (she was also 17). She tried keeping a baby corn snake in a plastic drawer in her closet, and kept her frozen mice at my house. It all ended up being a big disaster because the snake escaped on more than one occasion and her mother eventually found out. Her mother wasn't as upset as her step dad was. I offered to take it and keep it for a year until she moved out, but it ended up escaping at my house too, and, well... we never found her. My friend's parents didn't trust her in the first place because of other things she had done, and keeping the snake from them just made it worse. I don't think hiding anything from your parents is a good idea, I'm on the verge of 19 amd still living at home, and tell my mom everything and she trusts me because of it. I'd recommend being patient and just wait until next year.