ummmm, your lodger hiding bottles reminds me of a friend in AA. He called a plumber, who went up in the loft with him. The plumber found, lashed to the cold water tank, a bottle of vodka. Now, my friend lived alone so who was he hiding the booze from? Never mind the thought process that has a man equip himself with string and climb up into his loft with a bottle, just to tie it to the plumbing.
Hiding empty bottles is just hiding evidence. Hiding full ones is another matter. Alcoholics live in constant dread of running out of booze. So what we do is hide a bottle in an unlikely place. If we forget where we've put it, so much the better. If we run out of drink and can't get any until 8am, when the booze counter opens, we'll know we may find some somewhere, even if we have to strip the house to find it.