If you've got the right C:N ratio (brown to green, except that grass clippings are sort of brown, and manure is green...) the compost doesn't need to be turned. Most yard waste is way too high in the C though, so it won't break down unless you add manure.
Grass clippings in the garden bed are a bad idea unless you really like pulling weeds.
I compost pretty intensively at home (composting toilet), but do not generate yard waste where I am at. I also garden for one of my clients, and I use her yard waste bin for leaves, twigs, pruning debris, and grass clippings. She has a small compost bin for food scraps, but if we put yard waste in it it gets bogged down and stops doing it's thing. I suppose I could haul it all home and use it in my bin, but that would be a major hassle.
edited to add: unless you are burying bodies in your compost pile it shouldn't smell. If it does, add more carbon.