To race or not to race

I'm thinking about doing the Shelter Island 10k this weekend. I did it three years ago and remember how challenging the course was (yes, SI is very hilly) and how much I loved it. The race is at 5:30PM on Saturday. It's nice to not have to get up early for a race for a change, but with an evening race, I'll be spending the entire day watching everything I eat and drink (I remember doing that in 2007). There's also the fact that I still feel Eaglman in my legs. Registration is open until tomorrow night, so I guess I'll give it another day.