I hang my posters gallery-style. Get a piece of glass (or plexi) cut to the exact size of the poster. Buy some nice hanging nails and use them to rest the glass on - one at each corner. The nails pictured below have a really nice edge, hold the glass well, and leave very little damage to the wall.
You can pick these up at a hardware store or a framing store.
I've hung entire shows this method and it's very nice. I also used to work at a gallery and this method was the preferred method for hanging flat artwork. No framing of any kind was needed.
![Picture Hanging Nail](https://i.stack.imgur.com/ZMZzs.jpg)
What you have suggested are great ideas, but perhaps a bit overkill (unless you intend to hang full reusable grocery bags, gallon of milk included).
The best solution I've come across in similar storage searches, is to create a decorative, but sturdy rail, mounted on your wall. They make similar systems for garages that are effectively modular, and typically an engineered metal solution. A nice 1"x3" of finish grade, poplar or similar (with or without trim, paint, etc) Could be attached with appropriate hardware to the studs of your wall, similar to how people might mount a chair rail.
Then, any number of hooks, loops, carabiners, etc. could be easily attached to this sturdy, yet decorative runner. Otherwise, unless you only mount on studs, you'll find drywall anchors will work out as drywall has a poor working performance.
Depending on the statement you're looking to make, and the location of your project, I might suggest a board with several light duty recessed pan fitting rings. These will certainly be cheaper than what you had suggested.
![enter image description here](https://i.stack.imgur.com/0wj7L.jpg)
These could be neat in a storage area. Look HERE on Amazon.
Now, specifically for storing empty grocery bags (reusable or otherwise), the best solution I've ever seen is a "grocery bag sock" or "stocking". It acts as both storage and a dispenser. That is personally how I manage a myriad of reusable grocery bags at my home.
Good luck and let us know how it turns out!
Best Answer
Two approaches come to mind:
Thin nail picture hooks
These use very sharp, very thin hardened nails that can be removed leaving a hole so small it is nearly invisible, even in finished wood. If it were noticeable, it could be concealed with touch up wax. Various weight load sizes are available. The sizes that have the thinnest nails can hold at least 20 lbs. each, more if pairs of hooks are used.
Removable hooks
These are glue on devices in which the glue strip can be pulled to remove, supposedly doing no harm to the finish of the wall. These hangers are limited to loads no greater than 5 lbs., but the use of two hangers would increase that load.