Yes

In principle, yes! But you have to realise that Air-Tags are not GPS tracking devices.
They require that there is at least one iPhone at the same location as the object to be found, with which the Air-Tag can communicate. In a campsite or car park, this is likely to be the case. However, if the object is in the wilderness or a barn where there is no iPhone for miles, the item cannot be located again until it is in busy public view.

Yes 👍🏻

absolutely

Yes 👍