This quesion is more about those people who live with other people who are not prepper's type's . My friends are both prepper's and the extra person person in the house is also is a prepper and this got me to thinking about those people who live with roommate's and how do they hide there food & other supplies from a non prepper person
Duct tape! First time you see non-preppin roomie with their hands in the preps, duct tape them and put them out on the front porch for a while. After 4 or 6 hours, untape them and let them know next time they touch the preps they will be duct taped for 12 hours then hung from a tree and used for target practice because it is getting close to that time again to rotate the ammo preps.
Trailer hitch works better...otherwise they block the radiator and my truck overheats on the highway...
I dont like to do that anymore. When people get a little too worked up, they tend to release body fluids and I HATE cleaning a mix of vomit, pee, and tears from my windshield!!
Velcro can be fun...... stick him up on a wall and leave him a day or two...... Second offense, the sewer..........
Back to the OP's question. You can very easily convert the space beneath a standard bed, as well as your personal closet into storage. I had a very simple method of keeping people out of my bedroom. A small 15.00 investment on a keyed doorknob should be enough to (hopefully) secure your room when you are not about. Of course, if the room mate has half a brain, and you are patient, you can usually turn your roomie into a prepper, and even start a prepping group together, including bug out plans, shared large purchases, etc. Let me just say this. I never roomed with someone I did not personally know for a VERY long time. So, I cannot say I have had to "convert" someone to the prepper mindset. Almost every one of my friends from my youth are preppers.