I would make a prop drill, not bring a real one.
They're not going to want you to have anything sharp, and it's a liability not only to them, but to you - what if you trip and fall or get pushed and someone gets stabbed or whatever ?
You could potentially gut a real drill and replace the bit, but I think it would be easier to make it from scratch ! I love doing things like weathering and blood spray so that would be fun if it went along with the costume (bloody drill and clean costume might be odd).
Actually in the pipes:
- Remaking Ser Loras doublet.
- Luke Skywalker, A New Hope
- Wind Waker starter costume in swim material
Eventually: Paul from Dune, Faramir, Harry Sullivan