Fire Creek Campground is 5.3 miles from the trail-head. The trail has incredible views so I highly recommend taking your time. We stayed at Berkeley Park Campground to have a short day on day 2 to get to Fire Creek so that we could really enjoy our time. I do not regret it.
The hike from Berkeley to Fire Creek is up, flat, and then down. I thought I would go back up to the flat spot to enjoy the evening, but it was far enough down I decided not to.
The campsite is about .5 miles off the main trail and when you come into the campground, you descend steeply. The first site is the group site, then the toilet trail, then the three individual sites, each lower down. We got site #1 and did not look at the other sites, though I did hear one was closed and someone had some trouble with wasps.
We had a great site. They leveled it off and the site had some planks to sit on, trees close enough together to set up a clothing line, and a stream running right along side it, so we were able to dunk our clothes (no soap in the creeks please), as well as take a very cold dip.
The spot is surrounded by trees, so we had a nice canopy and a good night's sleep. We felt nicely separated from the other sites.
The only reason I gave 4 out of 5 stars was the wasp issue another group had, they ended up leaving their site and camping out with others in the group site.