All the bodies, dead horses and charred black spots on the bridge could have been a sign. A lot of the time there are visual cues to give you a hint of the dangers ahead. Not always of course, but pay attention to your environment, and the player messages/bloodstains and you will be a little more prepared.
I'm expected to figure out that some dead horses and black spots mean that the thing that appears to be sleeping far away and can't see me is suddenly going to come over and chase me down!? Welp.
And I wasn't connected to the internet until I looked online and realized that there are messages and such scattered around if you turn it on... that probably would have helped.