akuperma > without going away on vacations.
Doctors told Netziv to take a vacation on Lithuanian lakes. He sneaked away back in a week as he felt miserable. On the other hand, there were towns in Lita where many Rabonim, including R Chaim Ozer Grozdinski, would go during summer. He once took one of his students to the forest and showed him simanim which berries, grasses and mushrooms are edible. The student was not sure why, but later was able to survive during WW2 in the forest due to this.