I had the same arrangement, 1/4" copper pipe through the wall with a shutoff valve and disconnect. The inside line ran to the door where the secondary regulators and manifolds were mounted.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk