Citizens lined up at checkpoints, government agents menacingly coercing drivers and passengers to comply, refused entry if you fail to submit. East Germany? Soviet Union? Red China? No. This is your Texas Gulf Coast.
Citizens within 100 miles of any border or coastline can expect to leave their pocket constitution at home. At least that's what the proponents of this infringement upon the "land of the free" are hoping you do.
Drivers wishing to use the Bolivar-Galveston ferry are expected to stop and be "screened" by the Department of Homeland Security before being allowed to board the ferry, which is the only way between the two points.