So, I'm thinking about ordering some hops from YVH. They seem to have great prices and buying in larger quantities that 1 oz packages seems like a no brainer, but how long do they keep. Once opened do I have to use the whole thing? I like hoppy beers okay, but I don't want to have to use a pound of 11 AA citra in 5 gallons of beer. What is the best way to repackage after opening? Feedback would be appreciated.