Minecraft - How I Will Catch the Warden in Survival Mode

This is a video of a test I did in a creative world to see if my hypothesis on how to catch a warden was correct; it was.
This shows how I can name the warden without dying, get the warden to the surface using a bubble elevator, lure it with a flying machine, and then drop it into a cage. All I need to do now is set this up in my survival world.