Glacier is an amazing place, but it requires some serious hiking to get an appreciation of what’s there (especially to see wild life). Grand Teton’s on the other hand offer more to the car traveler or causal walker. In last 15 years, we’ve been to GT 3 times and Glacier once (approx. 5 days each trip). In GT, we saw average of 3 – 5 moose, and dozens of bison, antelope & elk, every day (we go out looking for them). In Glacier, we saw 2 moose and one grizzly in 5 days, and were fortunate to see them.
Caveat – the “Going to the Sun” road in Glacier is probably the most impressive section of road I’ve ever driven.