heres what i do man.

1st} get a jar of peanut butter and take off the seal in one whole peice... Ill explain later
2nd} dig out a hole in the center of the jar.
3rd} stic your bud in a baggy, ziploc saran wrap or whatever. and put in the jar. cover over the weed with peanut butter.
4rth} super glue the seal back on top of the peanut butter.. less conspicuous if they search it.

the only thing you'll need to worry about is shipping charges.