This is very much how we conducted operations on my last rotation to Northeast Afghanistan. On overnight operations, platoons would leave the Firebase dismounted with a light load enroute to support-by-fire positions or a village for a cordon and search. At one of the hub FOBs, prepo packages of water, MREs and other supplies usually contained in body bags nicknamed "speedballs" would be air-assaulted to resupply positions during the operation. These packages were designed to quickly and easily resupply elements while keeping excess low and their fighting load light. I'm not a logistician, but the system seemed to work well and certainly prolonged our small unit endurance in the extraordinarily difficult terrain of Kunar, Laghman and Nuristan Provinces.