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What Marc is getting at is that most folks will shoot darks and bias frames with the scope lenses cap on. So you only need one set of each. As far as flats are concerned, honestly I never use them. If you keep your filters clean, and your camera and scope optics, there is no need. Of course, you did not mention what type of camera you are using, that might help. If your using a cooled camera, then shoot all your bias and darks at the temperature you plan to shoot your lights at. Build a library of darks and bias frames, darks for each of your typical exposure times. Some cameras are so smooth and dependable (like the ASI1600) that you can produce consistent images simply by reusing darks and bias frames from your library (ie, don't shoot them at every session). But do what you please.
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