hi gkdd, I have taken several rides with my son and it was 30-40minutes. Each ride has been wonderful, the views were excellent, had a super fun. It was a well worth of money.. Kids love this very much, so your boy won’t get scary because my son was also 8 when we tried this ride. He did it …and the overall experience was just an awesome feeling. It was unforgettable. Great way to see the whole area, including some of the mountain. But, fortunately I took a video of the ride because it was more than 100 dollars. Probably worth it though. Scenic helicopter tour is the best way to explore the Great Smoky Mountain, so go ahead with your son.
Also I would suggest
Dolly wood Theme Park for you to take your son. He will definitely like it.
It is the Great Smoky Mountain’s great holiday adventure spot and having roller coaster rides, so don’t miss it.
Have a nice trip!