Along with a lock, one of these (tail light, motion alarm, horn) combos would not hurt. I bought several when Amazon was clearing them out for $10: https://www.amazon.com/dp/B0C3GXJNQG

Aliexpress has the same model, or Amazon has different brands and models. They can alert you that nosy varmints (bears?!) are in your stuff if you forget your bags on the bike, or a little extra peace of mind when it's locked outside your tent--thieves do prowl certain PCR H&B campgrounds, since they know there will be expensive bikes and gear there.