I contacted Frank at the "Hook, Line, & Sinker" sportshop in Crivitz. Based on reports from area fishermen, he states the following:
(as of 12/16/10) Lake Noquebay, Caldron, High Falls flowages, have about 5-7" of ice. there still are soft spots where snow is drifted, especially when the snow is discolored (darkening). Fishing has been slow with few guys actually out and about. Extra cautions is advised on the flowages.
Remember flowages are not like natural lakes they have current.