Run center left to avoid the meat of the wave holes just to the left. Stay away from the diversion channel halfway down on the river-right bank, and a pour-over rock (pour-over @ 2300cfs, probably sticking out of the water at lower water level) on river left. Don't get complacent when you are done with the rapid as there were a few holes in the bottom left of the runout of the rapid.
You can scout #4 from the river-left bank. There is a dirt road close to this rapid, and you can drive up to see it before putting on the river or get out above the rapid.
https://www.youtube.com/watch?v=ZaVt0cqg2GU&feature=youtu.be