I am going to make an Interrail trip in September this year, which will be a mix of rural camping and city trips. Due to the camping, I am considering taking my Mora Garberg (blade length: 10.9cm, blade width: 3.2mm) with me, but I am unsure about the laws and how the different train companies handle this topic.
I am planning on starting in Barcelona and continuing to Rome via Toulon. After that going to Slovenia, Austria, and Germany.
I thought of packing the knife into my sleeping bag (unlikely to be searched), but I don't want any trouble with the authorities. I am considering workarounds, e.g. my small Swiss pocket knife, but I am unsure if even that is illegal.
I don't carry it in the pocket of my pants when I am e.g. walking through Rome, but I am afraid of e.g. someone searching my backpack when crossing borders.