The six months prep allowed them to tailor their clothing I suppose. But I don't think those months should be put down for any reason. It would only be smart to learn the skills you need. And I'd say those six months of preparation will serve them well for their entire life.
Vandwellers live much more simply than most, but without our trips to the grocery, water spigots and laundries, how well could most of us truly survive and for how long? Not many of us would unless we learn fast before the freeze-dried food runs out...myself included. Okay maybe HDR and a few who are expert foragers? Just saying, I'd give them their due props. LOL