I was pleasantly surprised when we visited Northwest Trek last year. I thought it would be some type of hybrid zoo/amusement park/cheapo deal. It wasn't at all.
What we saw was a beautiful rainforest canopy, lots of creatures, and a wild, open habitat (with the tour buses going through) and plenty of rare and incredible animals. I felt like we weren't near a city at all. It was great! Everything was built into the existing landscape, not the other way around.
The drive into the park itself is so scenic, like a little hideaway. The trams that take you on a tour through the park are clean, nice, and the tour operators are informative and helpful. My kids loved it, seeing all the grown animals and baby animals. The setting is gorgeous and well-maintained.