A .85 camera doesn't work well for 35's. It's good for 50's and up, so if you decide to get one try to get a .72 or .58 as a second or backup. You seem to like the 35 focal length, so you should try to get a body that works well with that focal length. They aren't really water resistant, but don't seem to mind a reasonable amount of moisture either. For extreme climates, there are better cameras if that's a prime criterium. I've used Leicas in -40 to +115, and some work well in very cold weather and others started freezing up. When I was in a cold climate, I also had Konica Autoreflex cameras, and they kept on working better in very cold weather. Even the meter worked.
I've shot penguins in the wild in South Africa and in the Galapagos, and long teles weren't always necessary. In both cases my main cameras were Leica M's, with an SLR and long lenses available. Most of my penguin shots were with the Leicas. I also tried to get some underwater shots with the SLR in an Ewa-marine in the Galapagos, but those things are FAST underwater! and I got nothing useable. I would love to have some more chances like that, though.
Henning