Final answer:
Jethro is confirming a childhood activity of throwing rocks, which is a casual outdoor activity. Even though Jethro has an absolute advantage in camping skills, it's better for the group to share tasks for improved team dynamics.
Step-by-step explanation:
Jethro is confirming a childhood activity when he says, "Shore do! Used t' chunk rocks at 'em." He is reminiscing about a pastime in his youth, which involved throwing rocks at targets, most likely in a casual, outdoor setting. While this does involve a physical action and could be seen as the development of a skill, the context suggests that it was more of an informal activity rather than a serious skill development or a structured game.
When considering whether Jethro, who has an absolute advantage in all aspects of camping and is a great athlete, should do all the work on a camping trip, it's important to consider the principles of teamwork and efficiency. Despite Jethro's capabilities, it may not be the best choice for the group if he operates solo. Division of labor allows everyone to contribute, can improve group morale, and avoids overburdening one person. This principle suggests that tasks should be shared amongst the group to promote a better team dynamic and camping experience, even if one person can perform all tasks more efficiently.