Creative or Crazy Way to map water lines?

I have a smaller 22 pads park in central Georgia that was built in the 1950s. The park has old galvanized pipe ‘buried’ maybe a few inches deep. How crazy would I be to pick up a metal detector for mapping these lines? Sounds like a creative/cheaper initial solution, but I’ve never used a metal detector and don’t know what to expect.

Water lines can be very shallow when there’s no real frost line to worry about.

That would be amazing if you can do that. You could use your detector and map the lines and mark them as you go. Use a probe rod to confirm the pipe is there. At the end, you could overfly a drone and take an aerial map. That would be a simple and cheap way to do it if it works, however, I don’t know if it would work. In my area, water lines are buried quite deep.