Wal-Mart is currently selling wheeled, stackable storage boxes that are perfect for storing and transporting camping and prepping equipment, and hauling shooting gear to the range.
The box’s dimensions are approximately 31″ x 17″ x 13″ and are just large enough to store sleeping bags, tents and tools, yet small enough to stack out of the way in your garage or attic. They have recessed wheels on one end that makes it easy to pull the boxes along smooth surfaces.
There is a place where you can lock the box with a padlock, but it could only be used to keep honest people out of the box as it would not be very hard to break the hinges and gain access to the contents.
The boxes retail for $20.