Don't skimp on the packaging. Insure as much as you like but the insurance won't cover the disappointment and hassle of a bass turning up damaged. Use a hard case, not a gig bag. Keep the bass tuned in concert. That maintains the neck in balance with the truss rod. Make sure the bass doesn't move in the case. I then get a bicycle box from the local bike shop. IME they are glad to get rid of them. The Bike box is usually bigger than the bass case so I pack the spaces on all sides with expand