Bring a few extras then? Tape them to the inside of a Pannier onto the stiffener . I put the Right Rear in the pannier on that side, Left length in the left
and a couple for the front in one of the front panniers .. only used 1 . in a decade. .
Our LBS, here Has a simple Hozan spoke threading tool to make up a spoke or 2 for Touring cyclists , on the spot.