I think both these are worth doing. Yes, they are walk through attractions, but the view and the story behind the walk through are amazing. On the Trek you get a great view of the tigers, as well as other animals. To me, the highlight of the Trail is the gorillas.
I've heard a lot of people complaining that AK is only a half day park, I always say that if it only takes them two hours to complete they missed the entire point of the park. AK is not about running from ride to ride. It's about slowing down and exploring the environment, that's why it's one of my favorite parks.
Yes absolutely! The Maharajah trail where the tigers are and the buddhist style flags are flying overhead is one of my favorite places to be in all of Disneyworld! I don't know why, but I always feel goosebumpy right there.