We froze the first batch of pelts the way I learned to do racoon pelts from a guy who hunted way back when fur was SALEABLE <sigh>
We turned the hides inside out, and I laid them flat in the freezer inside large gallon sized ziplocks. I sucked out as much air as I could before sealing the bags. The people I learned the method from actually used newspaper between the pelts, and put them in a garbage bag (didn't have ziplocks back in the stone age)
I know some roll up pelts, but the inner part won't thaw as quickly as the outer (since fur is an insulator) and you can end up with strange things happening.
Be sure it's a DRY as possible before freezing, too.