Hi Andy,
Be carefull coming in and you'll be fine. I've done this trail in the dark and it's not too awfully bad.
I would make sure you have this map. When you head up the trail, take the SECOND 190B to the left which will merge with 310 which takes you the rest of the way in.
It's a good three hours in so I'll see ya close to midnight I would reckon.
Wake me gently!