Also I tied duck decoys to every stack of tires and structure I put in my pond for easy location.
Duck decoy locators = excellent idea in warmer climates. I lost every one within 2 years due to shifting ice = no good for frozen ponds.
You could pinpoint them with a good GPS fishfinder, or make floating locators that don't reach the surface in winter, and always stay below the bottom of the ice in winter, or do both.