Still, there were many times we'd just watch as the animals grazed or strolled about.
To me, the most majestic of the animals were the bison. Whether they were standing atop the crest of hill, or simply grazing in a grassy field, they are such a powerful reminder of what this continent looked like not even 200 years ago.
Our luckiest viewing of them was one where we were (for quite a few minutes) the only people who'd spotted a small herd of them attempting to ford the Yellowstone River.
into South Dakota.