Hiding coke from police dogs

So on new years I am going to a big event with day drinking and would really like to bring some coke with me but there are police dogs as you enter trying to find drugs now I was thinking (bit gross) about putting it up my special hole (aka bum) maybe in a condom and im also I am under 18 (please don’t comment on my age) so if I was stoped there’s not much they can do if the dog starts having a good sniff at my bum now will putting it in the places where the sun doesn’t shine would the dog still be able to smell it even if there was no Reminence left on the condom I’m not very educated about making drugs smell proof to dogs but could someone please give me some advice or maybe other ways to sneak some in with out getting caught cheers in the uk by the way