I say dont do it for a couple reasons. The main reason is you're already nervous about it and airports do more than check your luggage. They check people out as in they will look to see if your sweating, moving your hands, ect ect and that right there will make them search everywhere no matter how good you hide it. The other reason being just not worth it unless your making 5-6 digit mula. But if you insist on trying it then id probably take a couple Xanax(recommended dose not recreational dose lol) before i went to calm my nervous a bit, Then for the hiding, There is thousands of different ideas. I would probably just get a old dead laptop..Gut it,Put hash in a vacuum sealed bag, Place bag in gutted laptop, maybe put some dryer sheets in it with it, and If you got the extra cash even buy one those fancy leather laptop purse/suitcase what ever you wanna call it just to make it look more legit.
Good luck