Met someone doing a Singer-songwriter Bike tour Of thePacific Coast

on an Extracycle extended MtB, the Guitar [Rainsong CarbonFiber D type] in a styrofoam light-hard case.

It Packed nicely on 1 side of the Long Tail , a pannier on the opposite side and 2 on the fork ..

FWIW Here is a company Making a Guitar with the Neck, By design, Removable , so takes up less space.

This is the Carbon Fiber version, they also use Wood to make some too .. Just CF & epoxy is Moisture Absorption Proof.

Carbon Fiber Travel Guitar ? OF660 | Journey Instruments


I coped with My Irish-Scottish Trip much easier , being a Mandolin player .