Thanks to our modern conveniences we are not as hardy as we used to be. Bugging out on foot on uneven terrain all day, plus the need to run at times. Climbing may be necessary too. Average folks like me who like to hike for hours without stopping much need to understand the addition weight of gear and hiking all day for who knows how many days will take its toll quickly. I hiked with by BOB in the Adirondacks and let me tell ya. Just 3 hours in.....soreness started up. 6 hours in and I was ready to quit for the day. Now, imagine waking up painful the next morning and have to do it again. Bugging out, unless you go early, will be hell.