A big, intimidating friend of mine always left his key in the ignition and hence no need to take spares. On one trip up North, possibly to Alaska, he returned to his bike in Yellowknife to find his bike but someone had walked off with his key. Believe that it cost him $100 for a locksmith to create a new one.
To me a spare key (wherever you chose to store it) is insurance that if needed, should save you a lot of grief.
To me a spare key (wherever you chose to store it) is insurance that if needed, should save you a lot of grief.