I use 2/3rds of a 3 box set that Kodak photo paper comes in. The 40" x 100'  size fits all my rarely used maps w/o rolling 'em too tightly. It may even be archival. Who knows?

Any maps I take with get refolded again and again as needed. I have a file of 8.5 x 11 printed detail sections marked up that I tend to revisit more after trips as I add new ones.

Since I roll for storage, my thoughts on the curl. Roll 'em viewing side out so when you lay them out on a table they stay put.