Curtain rods can be re-used among the banner sets (except for Advent).
Wrap tape (masking, adhesive, etc.) around the "seam" on expandable curtain rods to keep the rods from slipping and shrinking (width) while they're hanging.
Drill a small hole near each end of the "top" curtain rods and insert screw. This will keep the hanging cord from slipping around on the rod and crowding or crumpling the top edge of the banner.