Do they serve breakfast at the fair?

Yup

There is biscuits & gravy @ the KSF

That depends on how strictly you define breakfast food. I haven't found any biscuits/gravy or eggs/bacon type of foods but there are a couple vendors that offer something a bit mote mainstream than KrispyKreme burgers or funnel cake burgers as well as some perhaps healthier options, like the fajitas (I mean, they do have vegetables in there at least!) The RoniDog is actually delicious assuming you like mac'n'cheese & hot dogs (a little throwback to childhood breakfast there maybe) but of course the old standby guarantee of hitting Carriage Crossing for a real breakfast before you go is always the safest bet, though perhaps not the most adventurous.

No. I don't believe so.