On account of a literal "snownado", and the resulting cleanup, delays in making a decent IC reply and/or drop of quality will occur. Chartose right now has the two basic choices of either helping fight the treants, or sticking with the group. Pragmatism and knowing nobody will help him suggests he should do the latter. Plus spears don't seem too useful at hacking tree-limbs. Despite knowing this is the better of two choices, he's still pretty conflicted about abandoning someone. He'll also be taking Lyle's ram. For safe-keeping.