I'm a United States Marine Infantryman and I'm here to say I personally have never used any type of vehicle to patrol. We've been transported past the line of departure, but after that, its a good hump. We usually wear the flaks with SAPPE plates, the LBV, i usually brought 10 magazines fully loaded, 3 MREs, my hydration system, my rifle cleaning kit, my M-16 A4 with surefire, PEC 2 attachments, and NVGs, my assault pack, a map and compass, a PRC 119 field phone (or an MBITER if were lucky), and my Kevlar, even my elbow pads and knee pads depending on the terrain, Gortex incase of rain, and a poncho liner. All of this usually weighs between 45 and 50 lbs. , and we'll hump it out for 10 hour patrols. We performed an ungodly number of those types of patrols in iraq, and i know ive personally never seen an American Marine patrolling in a HMVVE... We maintain in the Marines that with mechanical things (i.e. HMVVEs), there are too many things that can break and go wrong, so we hump it out on feet.. Thats why God gave us moleskin!