Hey Steven,
You can bring the chainsaw, it is unclear if you'll need it...though it could be used as an alarm clock in the mornings...nobody would likely do anything to you as long as that saw was buzzing, but you'll have to stay out of arrow & atlatl dart range. Just kidding.
There will be porta john there and the out building has a well, but it probably hasn't been run since last year & I don't know if the water is safe to drink yet. My company does well water testing, and I will have a sample analyzed before the event so we know what the deal is with it. If necessary, I can chlorinate the well beforehand to kill any bacteria present and leave a little bit in the well to kill any bacteria, but not make the water taste worse that city water usually tastes.
Otherwise, the site is a long grass landing strip with woods to the sides. Check out the pictures from last year's event to get a better idea of what to expect. Bring some bug spray & sunscreen, as there ain't much shade. Also, make sure you have a good ground cloth, as there can be quite a lot of dew. For anybody who is bringing tables or equipment of any kind, make sure you have covers for anything to be left out, or maybe store it in a vehicle over night to keep it dry. It is also a good idea to bring a towel to wipe the moisture off your chair.
I will also have bottled water and Gatorade for sale, but no munchies like last year. I got aggravated by having to stop knapping or what I was talking about to deal with anybody waving a dollar. I also hope to join in the knapping pit this year. I was kind of tied to the tables last year & want to change that some.
Jim