Camping at the farm: If you are into pitching a tent, there is plenty of space at the farm to do so. It's not a national park, but there is plenty of space for more than a few campers. The cost is free. Brent, the owner of the farm, usually brings out some firewood and creates a bonfire for those who camp out. He's a great guy and very welcoming. If a storm pops up, you are more than welcome to find shelter in the barn. If you do plan to sleep in the barn, please know I'll be there early Sunday morning to set up registration, so you might get an early wake-up call from me there. Also, for those concerned, Port-a-potties will be on premises (and you get to be the first to use them!). If you are planning to run into town for dinner, there isn't a lot to choose from (Casey's Pizza?), so be prepared to bring your own food along with you.
If you go to the Grumpy Grind 4 Facebook site, a couple of other local lodging options are also posted. They are "Roberts Roost Country Roost" in Savanna, and "Hickory Hideaway Cabins in Shannon". I have been to neither of these, but based on the websites, they look like nice places.
The closest hotels would be found in Rock Falls or Dixon. I don't believe Sterling has any hotels available any more.
Regardless of where you stay or when you travel to get to Milledgeville, please note that the towns along the way are small, and speeding tickets in those towns are a good source of local revenue, so pay attention to the speed limit.