Yeah you should just come. No body cares what people ski. There's always a group going somewhere easier. Even on the advanced terrain there's wildly differing rates of descent.
If it hadn't snowed four inches overnight would the mountain even open the next morning? Could you possibly ski on snow soaked by all that rain at 19 degrees? Maybe just groomers if they hit them at the right time before they froze?
Well such things are sort of common. I can't speak to Stowe, the regulars would have to. My guess having experienced it, would be the steep mogul trails, National, Liftline, Goat, Starr, etc would be closed. The groomers would be open unless they're steep. It really depends if it froze before they groomed or not. If before, it can actually be good on the groomers.
In the old days they would not have closed skiable trails just because they were slick icy moguls. This is what I've been told, and sort of what I remember as a kid, but honestly never kept track of. Those trails could never be groomed though as there were no winch cats. It's likely the bumps were also better shaped with 195-205 straight skis and a better average bump skier
At the Jackson gathering
@mdf and I skied the Hobacks after a refreeze. It was pretty bad. It's skiable though, you have to accept the jarring, vibrating feet, shaking eyesight, and possibility that the next turn initiation will go badly and send you off balance. Maybe way off balance. Honestly, it's way more skiable than manky glue. No way would I condemn myself to 20+ minutes of mank torture in there.
Refrozen bumps with those refrozen chunks on top offer a way to slow down on the top. Usually those chunks break a bit, and they don't completely impede going through them like rain soaked. We had such at Sugarbush on Saturday morning. In the fog you might as well go in because it's a natural speed limiter and you could usually see the next bump.
But say Slalom Slope at Abasin with huge refrozen bumps? Usually there's better ways down.