Hi Tracy, thanks for the trip report!.
The rotary is hard to get cabin heat. The exhaust is bigger diameter than most aircraft exhaust, so off the shelf heat muffs are hard to come by, not to mention difficult to fit (finding space) and potentially dangerous. I have had poor success at getting sufficient heat off the oil or water cooler. So besides sealing up cabin leaks, I found the soulution, heated seats.
Got these on Amazon for $45 for TWO seats. Installed in a couple of hours. Work great. My tush can only take the high setting for 20 min or so. Makes all the difference.
Dave Leonard
Turbo Rotary RV-6 N4VY