Tips for A Surprise Bonfire Party?

Hey, so I was hoping to just get a few tips, in case I've missed anything. For my boyfriend's birthday, I am having a bonfire out at my farm. The area we are having it is big and open, and there aren't people around to disturb. He doesn't know about this party, and I am going o surprise him. Some guys are going to have fun grabbing him, blindfolding him, and driving around for a while before getting there. Anyway, the bonfire isn't until around 7:30 at night. I am planning on having just smores at the party, and probably like pop. I have a present for him too and he will get that before. I was wondering if there should be anything special I could do, tips, ideas, things to do there? No booze by the way. And I dont have fireworks, nor do i have the time to drive to the border and get some. He is turning 19, I am 17. There are about 20 people coming as of now. Its in a week.