I always find Andrew Skurka pretty pactical. Probably more valuable for beginners, but you still might find worth looking over.
outsideonline.com/2414193/how-to-plan-backpacking-trip
outsideonline.com/2414193/how-to-plan-backpacking-trip
The road to glory cannot be followed with much baggage.
Richard Ewell, CSA General
Richard Ewell, CSA General