Can I bring chairs for lawn seats

You can bring lawn chairs but they must be the low ones.

Yes, you can have lawn seats & many people do. 9 inch height max. The Tommy Bahama ones with the backpack straps are nice and are usually sold in pairs.

Not a good idea to bring chairs

I honestly dont recall seeing anyone in seats on the lawn but i know you can bring in a large blanket to sit on. Every time I've been 5/6 times over 10 years i dont think ive ever seen anyone bring in lawn chairs.