By being dehydrate or freeze dried, they are very light and easy to transport. And the taste of the camping meals is usually excellent. This is the type of food you will want to obtain and store, to prepare for a long term survival situation. Don't try to take on the whole task at one time. You can break up your purchases and buy a little at a time.
Storage space can also be a problem.
But you might be surprised to find that you have many places to store items that you might not have otherwise considered, as an example in the space under your bed. Remember that dehydrated and freeze dried food will require clean water to be able to reconstitute. Also, when you obtain your supply of storage food, use it on a rotational basis. This will get your family accustomed to the taste and keep fresh product in the storage supply, as you replace that which is eaten. I hope it helps.