Next 5K-the Reindeer Romp!

I'm signed up for my next 5K! Yay! It's the Reindeer Romp in Cary, NC, on December 16. Proceeds will go to Girls on the Run of the Triangle. The description on Active.com says the course is relatively flat, so I've signed up for the competive division. I'll get a timing chip for my shoe. This being said, I know I'll be near the back of the pack finishing, but am hoping to beat 50 minutes.