Don't know about the Pine Valley side; someone else can chime in there. The Dixie Nat'l Forest folks are sometimes helpful:
http://www.fs.fed.us/r4/dixie/index.shtml
I'm guessing that the Oak campground on the SE side (road out of Leeds) is probably navigable. That trail is south-facing, and I don't recall seeing anything that looked like an avalanche chute right there. The trick comes when you drop down to Deer Flat and Further Water; that area often has snow up through June.
The top plateau of the mountain is wooded; the highpoint has a viewpoint about 100 feet to the south, and is hard to discern unless you have the waypoint on a GPS. The range has lots of lumpy summits that are like rolling, wooded hills perched on a cliff.
The southern route is like this much of the way:
for some reason SP is acting retarded with links right now, so go to:
http://hwstock.org/sig/
When you are in St George area, look and see the snow coverage on the south side of the peak. There are probably web cams that point to the mountain.
If someone has already traveled the Pine Valley trails (I'm guessing you want the "Summit Trail"), they may be packed. Otherwise those trails will be hard to find in the snow.