I have 3 Lawn tickets for Jo-Jo show Sat night. Can I rent lawn chairs?

No

I did not see any rental facilities there for chairs. Check the web site or call. I had seats, so I wasn't really looking.

I didn't see a sign Lawn Chairs for rent. Bring your own blankets and chairs! Bring a blanket to sit under the sky and a bring some food to eat.

That was not an option when I visited. I had to bring some from home.