Last year I hitchhiked around Europe for almost 4 months, and it was critical for me to find insurance that covers long trips and different sports. I found a suitable option at https://www.globelink.eu/backpacker-travel-insurance.html - I liked that there is a 15-month option and trekking coverage is included. Fortunately, I didn't need it, but the peace of mind was worth it. And have any of you actually used their services when losing luggage?