A few years ago I took my grandson (then 13) into Washington's Alpine Lakes Wilderness, on a trail that supposedly was completely rebuilt a year or two before.

It turned out that the trail consisted of gigantic steps 2-3 feet high. Being short-legged and with a bum knee, I had an awful time, especially going back down--I basically had to sit down and slide my rear off many of those steps. I came out at the trailhead with my hiking pants split from stem to stern down the seat. (Fortunately, I had a change of clothes in my car.)

Even if this trolley pack were allowed (it isn't), it would be impossible to drag it up and down that "newly improved" trail!