The pain you will feel is the reason you are there. It let's you know you are alive and makes the success of a hunt seem more well earned. What knd of satisfaction is there in shooting a deer off your back porch? None, it makes sausage but not fond memories.
I view the trip as an excuse to peak out my physical training cycle and really hammer out my cardio. On the trip, I work, work, work and smile because the Gatorade will taste even better.
While I'm a rookie at this stuff (backpack hunting), this is exactly my view!