You do not, I repeat, DO NOT want to put it into your carry on, no matter how well you think you've hidden it. It will be seen in the x ray nine out of ten times. You'd be better off putting it into a bag that you check. Best of all would be putting a small, small amount (a bud or two) into a baggy inside of a baggy inside of a baggy, then putting that into an old 35mm plastic film canister and filling it up with coffee, then just waltzing through with it in your pocket.
Best of all, of course, would be not trying to beat the system and just buy some weed in Houston.