I ended up putting all my cards in a binder with Ultra Pro 9-pocket card pages. I've found it easier to manage the cards this way... I just need to keep a few individual sleeves around for the planes flying on each mission.
Can you fit three cards into an individual pocket? I'm interested in putting my pilots into a binder. Have them separated into ziplock bags by aircraft type/year which is working fine but the binder has some "elegance" to it.
Also, how many pilot cards are in the game? Don't have that info at hand due to being at work.