Calif can srop produce not people at its checkpoints. I’ve driven through them. And the ummunities and privileges clause arises from the EXPLICIT right of travel written into The Articles of Confederation.
The people being stopped by the concertina wire are not Citizens — they enjoy neither Constitutional protections, nor does the Bill of Rights apply to them in the lest degree.
Citizens are not being unconstitutionally impeded because the wire is not being emplaced across routes of regular travel.