There is a hot air balloon company based out of Custer, SD that does rides over the Black Hills region. My wife and I have always wanted to take a balloon ride, and I can't think of a better area to do it. They can accomodate groups from 2 to 12. The price listed on their web page is $245 for adults, or $195 for children.
Are there others who might be interested in doing this? There might be a group discount price. I also wonder if someone from MOA could swing us a RALLY DISCOUNT? (Hint Hint...)
Here's their link:
And their phone number: