I've noticed that most of better fabrics are on the white bolts. I would use the white ones instead of the brown bolts to store fabric long term. I buy the Wilton coated cake boards to wrap my fabric. I get six to a package and I cut them in half and I have 12 boards for $4.50. They fit upright on the shelf and I can get 44 board on one shelf. That's with various cuts of yardage from 1 to 4 yards per board.
If after years I find white marks on the end of my fabric that touched the board then I'll just cut that part off.