I've had friends bring different amounts on airplanes....a few different ways....
One way, the guy made some peanut butter sammiches and put a baggy of chronic inbetween each one. I don't see any real strategy there because I'm sure dogs could get smell it over the PB....and he just brought it onto the plane, wasen't checked or anything.
Other guy brought about a ounce....duct taped between his crotch.....
Other guy brought a small amount, prolly more like the amount you are talking....a few grams...he broke it all up good, shrink wrapped it with one of those vacuum things and shoved it down inside a shampoo bottle.
I like the last idea the best.
Misdeanors for MJ are different in each state. In IL I belive anything over 28 grams (~ 1 ounce) could be a felony...depends if they throw "intent to deliver" on you or not....