Called the CRO today and asked about availability and for a comparison between the two.
As near as I can tell, the cottages sleep up to six people with a fold out futon in the "living room" area, and a double bed and a set of bunk beds in the bedroom. The cottages overlook the lake.
The cabins sleep up to eight people with two fold out futons in the living room area and one double bed in the bedroom. The reservationist told me that there's a "small area off to the side with no bedding" that's designed for two children with sleeping bags to sleep (guess that's how they figure eight people).
In either case there is no tub, but a stand-up shower in the bathroom. She said that because you're in the camping section, there is no housekeeping. You're given a clean set of linens and a set of towels at the beginning of your stay, and they have to last you for the duration.
Finally, the cottages overlook the lake, and the cabins overlook a pool area.
If anyone else has another story or differentiators, please share.