Let's see here, simple math, really....
Every day people get busted trying to do just what you are, and plenty get caught! Serious smugglers or runners get nailed all the time, and they have tried every thing. Weed triple wrapped, tin foiled, vacuum sealed, and submerged in gasoline, and the damn dog STILL picks up the scent for a more in-depth search.
I think if the dog can pick up the scent going through all that wrapping and submerging; then it just comes down to luck!
Kinda like gambling, 50/50, ya get caught, or you get away with it this time; you choose!
Really, all this for hash?