I camped here this weekend for the first time.  I have T-Mobile and was pleasantly surprised to have a bar or 2 of 4G LTE service.  Most of Lee Canyon does not have any service.  The sites were a little confusing to see where they were and some appeared to be in the middle of the road - but maybe that's the way group sites are laid out.  I went to the end of the road towards the sawmill trailhead and found a great spot.  There are more people here than Champion Road, both campers and hikers, runners and bikers.  Also a fair amount of 4 wheelers.  This place felt like a campground to me and less like dispersed camping.  There are the cleanest bathrooms I've ever seen at the Sawmill Day use area.  Overall, it was a great stay, with very clean sites, and cell service.  I would definitely camp here again.