Minerva is getting older and is showing signs of her going delusional. Will Minerva start to become a large burden on the group? If so, how do you think they will they respond?

I think that, given enough time, Minerva will be too old to face the rigours of being on the run in the wilderness. I do not think the group would forsake her though. They would figure out something to keep going. Minerva is too important to their moral and their identity to leave her behind.