here's what i do:
get icecube trays, crack an egg into each slot, and sprinkle lightly with regular table salt - go easy on the salt, just shake some over the tray. I don't know what the salt does, but i have never had a bad frozen egg. when they are frozen in the trays, shake them out and store in a freezer zip-lock bag. mine keep in the freezer 4-6 weeks, but i do bake alot.