“that must have been one huge backpack!!!”
There is a method called One Pot Meth that uses a single soda bottle, camping fuel, ammonium nitrate, lithium batteries, sulfuric acid and cold pills, all stuff available IN WalMart. So you buy all the stuff, put it in the soda bottle in the right order, and leave. If it blows up in a fireball you don’t go back, otherwise, you go back after the right time and walk out with meth in a solution. You have to get it into consumable form at home.