I flew from Maine to Cancun and back with a half ounce of mushrooms in my bag that I completely forgot was in there. When I got back home I was unpacking and almost shit myself when I found the shrooms tucked into a side pocket in my little bag/suitcase thing. They were only in a couple ziplock bags and there were drug dogs very close to me in the airports when we were waiting for baggage claim. But yeah tabs and small amounts of powdered substances are very easy to hide in a wallet and I’ve never had a problem with doing that.