This is what I do:
Collect scionwood (last year’s growth) during dormancy
Cut them into 6 - 8 “ length, at least 3-4 buds per stick
Seal exposed ends (both ends) with wax or in my case parafilm wrapping.
I sometimes add lightly damp paper towel with scionwood in a plastic bag (a gallon size) and zip the bag.
Put the plastc bag in a large, bubbled envelop