Disable backpacks in zones

Hi guys is it possible to disable backpack opening in a zone perhaps with a custom permission? We are trying to use this with the arena mod and being able to open backpack means people can take kit loot out of the arena. 

I believe that is an issue that ideally Backpacks and Arena should resolve. Backpacks already attempts to disable opening backpacks while a player is in an event. It also specifically calls Arena to check this, but an issue was recently reported in the Backpacks help forum which states that backpacks were still able to be opened. @WhiteDragon determined this to be an issue with Arena itself, which is not accurately reporting when the player is in an event.

https://umod.org/community/backpacks/32964-able-to-open-backpack-during-event-via-gui-button

OK thank you! I don't suppose anyone has the updated cs or the lines I should be updating? I am very new to c# and this is proving a struggle! 

The thread I linked mentioned some code changes but I can't verify them. Best course of action is for the Arena maintainer to fix it.