So… I just throw gel-silica pack into the coffee bag and voila, the dessicant actually works. I do not have any ice crystals plus I can open and close the bag with, dare I say, impunity. Just squeeze the air out. Absolutely, no degradation in flavor up to 3 months (as long as I have tested).
This is for pourover, not espresso.
I also vacuum seal as well when I have large batches to store.
I think the primary enemy is moisture, rather than oxygen when freezing. So the drama of vacuum resealing coffee, is eliminated due to the silica gel food packets.