The other reason for trying to avoid starting out with a tail wind is, after you warm up, you're gonna feel so good that you'll be tempted to open it up and overextend yourself early in the ride. With a headwind, you'll be more likely to settle into spinning an easy gear until you turn out of it.
Chocolate milk also is a great thing for a fairly quick anti-bonk remedy. That is, unless like me, you're mildly lactose intolerant. Last thing you want is the overwhelming urge to make
#2 when you're miles away from the nearest rest room. Which brings me to, might be a good idea to stuff some napkins or paper towels into a jersey pocket, just in case the mad dash into the woods while ripping your jersey off to take down the bib straps thing happens. It's only happened to me once, on a ride. I save the chocolate milk for my post-ride treat.