I've even wondered if he put different items of her clothing in different areas in what he may consider his comfort zones.
He knew he couldn't keep them for his girlfriend to see or find. Nor would he chance LE finding them in his vehicle if he went through a roadblock stop.
The reason I even mention this is sexual predators are known to keep items belonging to their victims so they can go back ,and relive the heinous acts. Both rapists, and rapists who murder their victims keep items belonging to their prey.
I don't know the soil density in the location where he dug an eight inch hole, but even that deep he had to have some type of digging tool...even a makeshift one. By only burying the items eight inches deep it makes me think he had planned to return for perhaps some sick twisted reason. He very well may have several areas where he has put her clothing.
Many murderers do not bury a deep hole to bury the victims. Iirc, the average hole is around 18 inches deep. This is why we see LE often refer to them as shallow graves.
There are so many ways he could have gotten rid of Linda's body where she will never be found.
Some murderers already had the place ready even before the kidnapping.
Imo, JS put a lot of thought into all of it before it even happened.
It's sad, but more murderers seem to be learning the more desecration done to the bodies the less likely evidence will be found including not being able to locate the bodies themselves.
I've also noticed an uptick in gruesome overkills being committed against victims by total stranger offenders who never even knew any of them.
Jmho
The thought crossed my mind that JS may have buried a few articles of clothing behind the Harvest business so that he could join a search party later and be the one who "found" evidence.
He resides in the area. It would not be unusual for area residents to join a search party. The buried clothing was not that far from the abduction.