If your reach-in closet is well organized, it’s surprising how much you can fit in to what is essentially a small closet space. What can happen is that the lower part of the closet can be forgotten or not organized as well as it might be.
If it is just a space where you might stack boxes or store shoes, ensure that these are items are stored as carefully as possible. A shoe rack could be installed to keep shoes in a good order. If you have loose boxes, items within could be stored either on low level shelves or custom built storage units.
Have a good think about what might work best for your household and then consult with a professional closet designer and you’ll see how your reach-in closet can be transformed into a really useful bedroom storage space.