I agree on the trails changing. That is also why I said yes to the rr4w trail rating with wording underneath (moderatly difficult) to help with any differences in opinion. The thoughts of how difficult are also a variable. I couldn't get an open diffed lifted ifs runner to the falls. He got snagged in a v-pinch between two rocks and couldn't climb it. So to him it was reasonably difficult. To a solid axled rig, moderatly difficult. But that wheeling.