Mt Whitney Zone Forums General Discussion What permit is needed to do a 2-day on Mountaineers Rte?

Wilderness permits are good indefinitely as long as you don't stay more than 2 weeks in one place, and you don't spend over 24 hours OFF the trail (exiting the wilderness). Re-entry within 24 hours on a trail other than the one exited would require a new permit.

So within the rules above, yes, they could leave their gear at Lower Boy Scout and exit and re-enter if they wanted.