I use a sleeve since over time the pins will wear out the fabric. I used to paint a skinny dowel rod (so acid from the wood doesn't damage the fabric) and then just screwed cup hooks into the drywall to hold it. The dowel rod is slightly longer than the sleeve so I would put the hooks just inside the edge of the quilt on each side. Very simple & still quite easy to hide the hole when you move out.
I now I prefer electrical conduit or a flat metal bar and screw magnets to the wall (or I've glued round magnets to a nail head & used that if I was worried I'd get in trouble for using screws).