I have kept mine with no issues for up to 3 months. Longer than that, I would consider a better method of sealing. I don't think the refrigerator smell will be an issue because it'll smell like a nice juicy rat once thawed also, never had an issue with freezer burn. I keep mine in 2 grocery bags in the warmest area of the freezer. That way they stay frozen without freezer burn ^^

1.2 Normal
1.1 Red-tail
0.1 Albino corn