Great advice from Pat, especially #1 as the corral will likely be a bit trickier than usual. If I had heeded this, I would not have deep sixed what was left of my ACL while looking for one of my best times ever.
Fastest guys/girls on my team typically run very late and take a line that hammers the gates when facing fresh snow conditions- also just as Pat mentions. They seem to be cranking turns just about as hard as they normally would.
I've tried both early and late. Late feels faster, but I"m still skiing cleaner (and faster) on the early course. Guess I'll call it rut-timidation even though I think I'm comfortable with 'bobsled' course conditions. My general line or approach was to get on my edges very early but gently, so that I (theoretically) would get a feel for how hard I could turn without jamming too deeply into the turn. As you would imagine, hammering a late turn will really dig in and push some snow which will kill your time.
We had some extremely frigid nights with fresh snow that acted like talc. Hard, graphite anti-stat wax helps, but at temperatures ~minus 20C or lower IMHO it's more about avoiding the wrong wax than being able to find a wax that works great. Whatever wax you run with, ensure that there is no excess left on your base and if you are unsure of selection- err on the cold side.
Spring is here- now we can have fun with our favorite waxes while we take it easy on the edges for a different type of soft course condition.