This is about what we would run for bale grazing waste.
The area behind the cows is the row of bales from the week before. We leave a bit more when we graze calves, but come in after with the cows and clean it up.
We are working with PFRA to do a bunch of research and this summer our bale grazing area went from producing 750-1000 pounds of dry matter per acre pre-bale grazing to 7500-9000 pounds of dry matter (roughly 6 bales per acre). That is the fertilizer effect. I suspect you get it as well when you roll feed out.
We haven't noticed any more than about 5% more waste than when we used to roll bales out in the field. When we sat down and figured out tractor hours, labour, fuel, etc. it worked out to over a $15000 savings for us as our tractor time went down to about 6-8 hours to feed for the winter and our chores with around 300 head here are running about 2 1/2 to 3 hours a week (barring disaster and cows out).
For us if we feed cattle 1/2 mile from the yard, 3 bales = 3 miles of tractor time. With our older equipment there is a lot less risk for us that something won't work.
We are bale grazing on pastures, and the truck drops loads around the field so I rarely have to move a bale more than about 300'. The other thing I like after a couple of stack fires around here this year, is that my bales are spread out a bit. We stack bales on end that we are 100% sure we will get to so twine is easier to pull, and stack bales on their side if they are near the end of our winter plan, so if we don't get that far they will shed water.
We use polywire and move it once a week or so up/down our electrified paddocks. There are probably better/cheaper/easier ways to do it, and I would be all ears to steal any ideas out there.