Real preppers do not let people know that they are prepping, and they do not let others know what type of supplies they have. They know that they would be in danger as everyone would go straight to them if they were hungry and in need of food, etc. especially if things were to get so bad that people were willing to kill for food.
Preppers also know to buy a few pairs of pants that are a few sizes too big. That way, it will appear that they are losing weight, even though they really have food to eat. Rule number one is to not draw attention to yourself, you need to look as hungry and in need as everyone else or you will be targeted for your belongings.
There are websites devoted to prepping, and you will find lists of common sense things that you will need if things get bad. They even show you how to do things that you never thought possible, for example, you can start a fire with your pee!!! Seriously, and it works!