Any thoughts on the ability of a dynamo hub to power or charge on the go DI2 or that new Eshift?

How long are you planning on being away for? di2 lasts for months without charging for even a regular rider.

di2 should last for quite a while however from experience the batteries don’t like being left in the cold over night. We had a lot of folks on a multi day event last year needing to charge their units after only a few days due to constant cold nights.