Hi Camille! Welcome to the Disney Parks Moms Panel!
My first ever
runDisney race was the Disney Wine & Dine Half Marathon, so it definitely holds a special place in my heart! You are correct that the general registration for the 2018 event opens on March 13. Typically, early registration for Walt Disney World
Annual Passholders opens the week before, and in 2017 it opened 5 days prior to general registration. If that holds true for this year, you can expect early registration to open March 8 at 12 noon EST.
This isn't the "official" word, so I recommend you keep your eye on the
runDisney event page for more information. Since we are really close to when registration will open, I assume information will be available any day now.
Enjoy planning your "racecation," Camille! Please feel free to bring any other planning questions you have to us!
Tabitha