We use a Furest tine harrow (I'm not sure I spelled the name correctly). It's essentially a drag mat with teeth that you pull behind your tractor or quad for that matter. I've had mine at least 10 years, it's always outside and it never shows any wear and that says a lot as we have sandy loam soil here that eats anything that engages the ground. I use it for grooming our outside arena (we raise horses also), dragging pastures to break up manure piles (does and excellent job) and I also use it to smooth the gravel drive in front of the barn. I recommend the tine harrow, no moving parts and simple as any implement could ever hope to be.
Daryl
Forage Services, L.P.