Not sure why you feel the need to leave quite so early. 15+ hours of light on June 1, so unless you are planning on a long slow steady assent you will likely not need over 16 hours. 9 hours up, and 6 hours down, with time on the summit is not unusual. Many do it much faster. However, this does not consider possible delays due to weather/snow. Leaving at 4:00 AM would have you starting in the dark, but would begin to get light within the first hour. If 16 hours is correct for you, this would have you back at the trailhead before dark.
If you do decide to take the "old" route, as suggested by Jessica, I recommend checking it out the day prior. Go up the old trail, and down the regular trail to get a basis for comparison. This way you will also cross the creek, and you can asses the challenge presented.

Just a thought.