My friends and I enjoyed our recent stay here. It's so close to DC, where we all live, and having the brewery onsite is a plus. There are a few things to keep in mind before coming out, however.
First, the camp site is literally an open crop field. You can set up anywhere except the area next to the pond. The open field makes for great stargazing at night, but does leave you exposed during the day. The only shade you'll have is what you provide, so I highly recommend bringing a pop-up canopy or something similar. You will also need to bring your own fire pit (think solo stove or something similar), as there isn't one on site. Some of the photos posted by previous campers show a ground fire are near the pond but that area is actually off-limits. The field is next to a well-traveled road so you'll hear traffic until it dies down at night. The brewery also features live music, which carried over to the camping area until about 9 or so. There is a Sheetz and 7-11 just outside the farm. Neither had firewood for sale during our stay, but Pitkin's Hardware just down the road had plenty. There is also a Food Lion about a 5-min drive away.
I mention all of this so that future campers know what to expect. We had a nice time camping here. The brewery and vineyard are lovely, and I must say that the beer was quite good! We bought a couple growlers and I suspect we'll return for another weekend getaway in the future since it's so close to home.