Hen Party Traitors

I’m maid of honor for my sisters wedding and am planning her hen party.

We have rented a large house with about 12 of her closest friends and I want to have a traitors game throughout the day.

I have a rough idea of how it will pan out but need a few ideas for missions, around 3, so that after each we can vote to try and find a traitor.

Any suggestions for mission ideas and any other tips welcome from anyone who has done similar! Thank you