It's true, $49 and you get a day of non-stop adventurous fun! I took three friends from out of town to the USNWC and we started the day rafting. Go on a Thursday as there was no one there and we had the place to ourselves. All three of my friends fell out of the boat which was hilarious. I managed to stay in this time--having fallen out before I was okay with not having an out of boat experience.
Afterward we tried the new mega jump. If you like the idea of walking off a cliff this jump is for you. It's scary once then not bad at all. We followed this with the ropes course and rock wall.
I've also done the Catawbwa kayaking and it was great--it's very pretty back where they take you. A nice date spot if your date doesn't mind rowing for a bit.
To finish the day we pigged out on delicious beer and fried pickles. Heaven.