I decided to just get the entire JMT Map-pack so I should be set. I doubt I'd go anywhere off-trail with him along.
Leaving the car in the valley may be a good idea as well. If we finish early we can leave whenever we want and that would also allow me to drop off a resupply package somewhere in TM so we'd only need one canister (planning to pick up a BV500).
It would seem Davis Lakes would make a good campsite to attempt a 20-mile push into TM if my son wants to attempt that merit badge requirement as it's pretty much all downhill once we're over Donahue.
I'm sure he'll be ready to get back home after Yosemite though as we'll be going to the Smokies the following week.

