I've had no problem getting my lightsabre thru the airports (now, Spaceport security is a totally different subject)
Here's my suggestions for the airport x-ray:
1) remove the powerpack and carry it in a separate bag.
2) (best option) use the Force to block the x-rays and put the scanner guard to sleep momentarily, (they're generally half-asleep anyway)
Now for spaceport travel: wait in line for a bunch of Wookees to come along and then just join the party -- no one ever messes with a Wookee!
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Life is a journey, not a guided tour -- GO ARMED!
-->BLADE