start out slow and have a plan.a few hours and make a fire.next time a very simple shelter-poncho or whatever-and a fire.next try a half day with a meal,shelter,fire.then carry this on into an evening with a foil sleeping bag or whatever you plan to use along with the fire,shelter,meal.after all that try a over nite.
i suggest this because unless you have camped out a lot you just may find that simple"survival" is much more than it's cracked up to be and without a sleeping mat,bag,tent,stove,food and so on that on returning home you just might toss the whole BOB as a unworkable "hobby" and give up on something that parts of could be useful.