Hmmm. Not sure if I was clear. Linking calendars isn't the issue as much as when people book in the winter, it's the same Airstream, but the terms, conditions will be completely different. For example in the winter there would be no running water and an outside porta-potty. Make sense. So I'm wondering if I don't just list them as completely different listings, one available as the "Winter Camp" option during freezing weather and the other simply as I do now only during warm weather where there's running water, shower, operational toilet etc.