Just spoke with Jane at Lake Tulloch resort and made reservations for Feb 7-8. And this is what she told me about the cabins:

Cost is $50 per night
They have 5 individual beds and will allow up to 6 people
Only 2 vehicles per cabin ($10 extra per vehicle per night)
They have Frig, and a Microwave
They have no heater so they suggest you bring your own.
For those bring up families the cabins have full electricity, so you can bring TV, VCR, Video Games, etc...
Fire ring and BBQ pit in front of cabin
The store will be closed so you will need to bring everything needed or 15 miles to closest store

Contact # 800-894-2267

FIT