I have been a hiking pole user for the last 20 years and have no plans to stop now. The only poles I can find that fit inside my pack are the obscenely expensive Black Diamond Distance Carbon Z poles. The salesperson at REI where I tried them out assured me that they are carry on compatible. Does any one know if this is true or not? I would like the El Camino to be a totally carry on trip. I would be flying from Sacramento California to Barcelona or possibly Madrid.