[DonC]

I've got the ERA stock heater and the Cobraheat seat heaters and with the top and side curtains can drive year round in Oregon.
Our temperatures are a little more mild than Ohio but I've been out in near freezing temps and been very comfortable. I do remove the wind wings with the side curtains on to keep the drafts in the cockpit down.
Don't usually go out in the rain only because it takes so much work to wipe down the underside. Have driven in the rain and while it leaks a bit (it has to by law) it's very doable.
DonC