Yup, I think Hercules has the goods - it's hard to ignore the samples so far, and the huge gold-bearing structure unearthed so far.
Caribou, on the other hand, I think isn't worth much. Kodiak puts on a brave face, claiming that there's stil potential there, but nothing in the results so far indicates that there's "enough" there to keep going.
I would be very surprised. I count on Hercules.