Whether at home or at work, ISTJs are nothing if not reliable, particularly when it comes to inspecting the people and things in their jurisdiction-quietly seeing to it that uniform quality of product is maintained, and that those around them uphold certain standards of attitude and conduct.
I did a real boot camp once which with The Thin Red Line which was learning military exercises and this was far less strenuous. I really had a blast. We were all kind of thrown into the woods and we didn't have any of the modern conveniences that we take for granted. Learned how to survive without anything.