We have a lovely cabin at the bottom of our garden. Our daughter (12) would love to use it for a sleepover and this was always what we had in mind however my only concern is security. We do have a locked gate to the garden but I feel strange about leaving the cabin unlocked but I also have concerns about them locking themselves in (what if they lose the key or leave the key in the lock so we can't get in if needed). I also guess we should keep the house unlocked which is another concern. I am probably over thinking this but would love to hear other's views.