I've done it two ways....I've shipped it prior to the trip like Dan plans to...One advantage of doing this is that you can ship it back home the same way , which allows you to bring home more boxes of meat and capes as baggage on the airline without paying excess baggage fees..
Other trips, I have packed the pack full, frame attached and then wrapped the whole thing in a plastic bag as Moosie says..If you do it this way, line the INSIDE of the pack with a clear plastic bag and put your clothes, etc. inside it...That way when you get to camp you can just lift the clear bag out of your pack and it will serve as your "duffel" inside your tent.The clear plastic makes it easier to see to dig things out as you need them...