As I'd said at the meeting, River Country directed me to their website for rates. We'd need 20+ people, and the rate is apparently the same for a 2, 3, or 4 hour trip. The rate is $17 per person on the weekends. You basically pick out an inner tube, get on a bus for 20+ minute ride upstream, and float back. The water is warm and shallow, and there is a snack bar on the river about mid-trip (expensive and crowded!). You can bring your own food. Robin and I have done this trip, it is a fun, lazy trip down the river.
Linky: http://www.rivercountry.net/group.html
DrJ