Do you have a need to collect information about the parcels individually or only in aggregate? If you only want them all together, you just need to create a place with all the separate pieces as different parts of a single multi-part feature in a kml.
Once the place is set up, you use that place as the basis for a collection project.
Past and future observations would get collected automatically. Note that small places will not collect obscured observations, more info here: https://www.inaturalist.org/pages/help#placeindex