I'm unclear why they would be buried, there's no Moon-wind storms as far as I know.

Footprints from the Apollo missions can still be seen.

Anyways, I was thinking that the metal from the spacecraft wouldn't have gone through the weathering/oxidation that anything man-made still on earth would go through.

Moon artifacts would be there for a very very long time, and yes there would be no burying, techtonic activity, or oxidizing. Only impact events and solar wind really change the moon, the former is rare now and the latter insignificant. Evidence of a human presence on the moon will be there for potentially at least a billion years. The footprints might last that long, and actual artifacts made of metal (including gold) surely will.

Long poles anchored everywhere around the moon.

Even if some of them will get covered by dust and some get destroyed by asteroid impacts, the others will remain visible.

You don't get a better anoxic environment than space!