Sam,
I was shooting with my Canon 40D dSLR. Most of the shots were with my 70-200mm f/4 IS lens (a few also had a 1.4x TC attached for extra reach). The indoor polar bear shots were with a 17-55mm f/2.8 IS, and the penguin and reptile house shots were with a 85mm f/1.8 lens. I have a Lowepro FlipSide backpack that works very well for a three lens + accessories travel kit.
David, the polar bear had some sort of toy that looked like a large bone in his mouth. This was the first time we saw the bears swimming while we were in the tube -- last year they never came into the water when we were there. It was a great viewpoint to watch them.
The wolverine was a first for us, too. It was sleeping in its cave last year -- just like the football team.

Hopefully his active demeanor this time is a good omen for this football season.