First camping trip and im nervous?

I'm 14 and going on my first camping trip on a school trip. We are camping in the woods for 1 night and I wondered what you think will be on the obstacle course. I think theres that thing when you go down the rope from top of a tree or summat. Theres somethings I don't know anything about too so can you help me with them:
Low ropes
Night line
A bivouac

Thanks
 
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