hows your chicken box looking? it's almost TIME!!!
my honest opinion, you are a bit behind/cutting too close. plus, you NEED sleep.
i start the big meats quite a bit earlier and time it so they wrap either right before sleep or first thing waking, 6A ish ideally(jaskew knows how that works). ribs around 7:30A, rather rest them than run out of cook time.
look forward to see how it turns out for you, but those are my 2 cents. i cook on WSM's as well.
*edit* duh, you're 3 hours back...you've got plenty of time for chicken.