You are talking about the woodside to green run, not price canyon correct?
If so, you should be fine. It is moving fast though. It was above its banks as of Monday. It is mostly class II with some III for most of the run. There is one class IV drop that has a lead in pool near the end. Very obvious and an optional easy 100 foot portage. I ran it at comparable/slightly lower flows seven years ago. Also, you should consider putting in at the mouth of the canyon instead of at the highway. Otherwise you are running 8 miles of switchbacks through the middle of a very boring and redundant field. I don't remember being able to scout it, with the biggest issue being over grown tamarisk which I suspect are now dead.
Regarding Price canyon(roadside run on 6 west of helper). It is the biggest I have ever seen it. Mostly IV with some V. Looked clear Monday and was clear when my buddys ran it Friday.
Good luck and have fun.
God Bless SKA Brewery-Sturgeon General