We stayed at the Treetop Condominiums at Four Seasons from 11/7-11/14 2008.
A couple things about the place.
1) Unless going for quiet walks, fishing, or boating in the cold... only go during the tourist season. Other than bars and some shopping stores, the 2-3 closest towns shut down 85% of their attractions and 95% during week days.
2) Any directions that you get on-line that don't end with you taking Business 54 (Bagnell Dam Blvd) to State HWY HH (Horseshoe Bend Pkwy) are wrong and will send you way out of your way. Google maps will find the resort if you use "594 Horseshoe Bend Parkway, Lake Ozark, MO"
3) The resort is not one I would recommend for folks with small children.