1. You can get padlocks & even handcuffs with timers on them, some of them are pretty heavy duty, if you don't want to make a trip to the hardware store you can order delivery online. [![enter image description here][1]][1] [![enter image description here][2]][2] [![enter image description here][3]][3] [![enter image description here][4]][4] Combined with a strong cellar door (or a heavy duty steel security door if you must) & there really shouldn't be a problem. Just be sure you put all the tools out of the room before locking yourself in. None of that stuff is particularly expensive & is all pretty easy to get hold of. 2. The other really obvious precaution is to have **really** big pig-out the day before the night of the full moon, when I say 'big' I mean unreasonably humongous, that's stomach stretching "I'm in no condition to do anything but lie here & be very still in case I hurt myself" huge. You've said they're psychologically like ordinary wolves during this time & wolves don't hunt when they're stuffed. 3. Drugs, off the shelf sleeping pills & whatever else they can get hold of so they sleep through the full moon, a helpful doctor friend (or relative) might be good but so much of this can just be bought online & delivered by post that it really isn't isn't necessary. A practical knowledge of wild herbs can also stand in for this. 4. And finally something topical, "social distancing", go camping. Make sure you're over a day's journey on foot from the nearest people before the full moon & that you've no other means of transport to hand. *Of course you can combine all four of these with a good solid concrete bunker somewhere in the wilderness miles from anywhere.* > **Edit : A timed lock for the medieval era.** > *You might not think timed locks are very likely or easy to come by in a medieval setting.* > *But, then again, perhaps not.* > First find yourself a cave. > Then you need a big rock (too heavy to move unaided & big enough to block the cave). > Now you'll need some rope some wooden pit props a source of water & something to sling your rope over, this all needs to be outside the cave. > Sling the rope over your 'something to sling a rope over' & tie the rock to one end & the bucket to the other such that your bucket is hanging in the air over your head, fill the bucket with water so that you can now lift & move the rock, place it over the cave entrance & wedge the pit props under it to keep it there when you empty the bucket, you know have to arrange for water from a nearby water source to drip into the bucket (you're going to need some piping). > Enter the cave kick out the props (or tie ropes to them & pull them away) & the rock slams down locking you in until the bucket has filled enough to let you move the rock. > Some experimentation with bucket size, drip speed & what have you may be required to get the desired timing. > Voila! & there you have it, one crude water clock locking mechanism. > *If your werewolves have access to craftsmen or else have the necessary skills themselves the same principles can be applied to something a bit more sophisticated in a normal cellar or they might use a clockwork timer & locking mechanism you set on the outside of the door.* [1]: https://i.sstatic.net/xQ3y4.png [2]: https://i.sstatic.net/liVNN.png [3]: https://i.sstatic.net/gu8BU.png [4]: https://i.sstatic.net/8qBGY.png