Tubing down the river by Cool River Tubing is a lot of fun. It takes about 2 1/2 hours to travel down the river but it is safe for all ages. It's a pretty calm river that flows nicely.
I also recommend hiking one of the trails. They have many trails for all kinds of levels. Some trails end at beautiful water falls and the water is safe to swim in. It's really nice to be able to listen to nature and not have to deal with your normal city life. It's quite peaceful on the trails.
You can also go to the Lookout area they have over the Tullah Falls. It's quite breathtaking.
Quick Tips:
I suggest that you don't stay in the city of Helen but stay somewhere closeby because the city is very crowded and quite small. You won't have any real privacy staying at one of the hotels in the city of Helen.
I recommend you find a nice Bed & Breakfast or a beautiful mountain cabin so that you can really experience the beautiful scenery and nature the mountains have to offer.
Then you can go to Helen for drinking at the many bars or window shopping at all the arts and crafts shops they have.
Helen has a lot of activities for the children. There is miniture golf and a amusement park for the children. As well as street preformers in the center of town at the courtyard.
Finally, don't leave Helen without getting some of the excellent Funnel Cake. Its the best I've ever had and they offer it with all types of toppings.
Best Way To Get Around:
You definitely need a car to get around. You may also ride a motorcylce or bike but walking is not much of an option unless you only want to stay in the town of Helen. Read Less