I used to be all obsessive about having my paper in the Cropper Hoppers and other "official" scrapbook storage containers. I even had my husband build me a fancy paper storage "shelf."
However, it was still a chore to dig through and find what I needed. Now I use legal sized hanging file folders and keep them in a hanging file bin (no cover, obviously). Every folder holds a different color and because they stick up and out of the folder, it is SO easy to find what I need.
I really recommend this if you can store your paper in a free-standing bin. I use three of them - one has plain colored paper, another has decorative paper, and the third is a letter-sized bin/folders for "scraps" (I save anything that might be usable in the future). Cheap, easy, and a HUGE time-saver.