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 stuffs particularly expensive & is pretty easy to get hold of.

2. The other really obvious precaution is to **really** pig out the day before the full moon, you've said they're psychologically like ordinary wolves during this time & wolves don't hunt when they're stuffed.


  [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