Thank you for posting those pictures of the area. The first thing that I see there is that many of the tracks in the dry grass were not made by only one vehicle going through there once. Other vehicles (or people walking) have been in some of those tracks previously or frequently. In picture 3, to the left looks like new tracks, to the right are tracks that have been used far more than once. Those same tracks are in pictures 1 and 4. Those have been driven in several times, note the wide tracks, how they are deeper in the middle and curve up on the sides, and how the grass between tracks is very tall, but in the tracks is pummeled to dust. In picture three, to the right, you can see where something came thorough and flattened the grass, but the grass that is flattened is tall, not mashed to bits into the ground.
IMO, from the way the pictures look, most of these that I can see are not drag marks (those must be elsewhere), or the marks of a one time vehicle drive/crash, but the tracks of where several vehicles or people have gone down over the course of the summer. Which means it is possible that Bryce saw these tracks, thought they went somewhere, and when he found they did not tried to get himself out of the situation, which is where it all went south. (as it often does when you don't know the terrain or what your vehicle can do). It is also possible that Bryce just tried to drive around the fence enclosure, cut the corner too close and hit the rise at the back corner of the enclosure too fast (the right corner of the enclosure that we see in picture 5) and just flipped it right there. (been there, done that, tore the t-shirt)
As always, your mileage may vary.