My hip and SI joint appreciate a chair...but to each their own!

Since there is a threat of rain and you don't know how well the tent will work, I'd leave what I could in the car both overnight and during the day on Saturday. The low is supposed to be 59, so I'd bring a pair of pants and a long sleeve top or jacket, along with some socks.

I always get pretty sticky camping and being basically outsie 24/7 so I bring a few change of clothes. A sun hat of some kind is helpful, too.