Thanks guys. We might actually spend two weeks there instead, which gives us more options (maybe a week in southern Patagonia and then the remainder in Chubut/middle and northern Patagonia).
Incidentally we had planned on heading over to Chile for a day or two, so yes, I'm interested in hearing whatever suggestions anyone has!
Mike, thanks for the link. I've emailed the guy and am anxiously awaiting a response.
Phil, as we talked about there is a 20kg limit for the LAN Argentina domestic flights. If you can trim down, I'll get you in the checked luggage!!! HA
Marty