Im traveling to the park this weeknd and i am planning on camping in my car do i have to reserve a camp site? Or can i park and sleep there?

I suggest reserving. It helps park rangers to know who is there to camp and those who may just be there for the day. Plus if anything should happen, rangers will know who you are.

Hope, you can...

Unless there is something going on at the park, you should be able to with out any issues.