Big rocks! 14"!
A HEAVY (100 pounds per foot of width, better 125 pounds per foot of width) Box Blade with scarifiers would be good. Buy heavy so you can dual purpose your Box Blade as Three Point Hitch counterbalance when using the FEL.
I like counterbalance weight equal to around 66% of FEL lift.
Box Blade scarifies are designed to penetrate only 5" to 6" for chipping out pot holes. If you go slow, scarifiers should not be damaged and will prize out big rocks down to 6", which is pretty good prep for pasture grass.
After a few passes with the scarifiers, picking up 3"+ rocks between passes, you can use the "box" to pull your sandy soil into the old and new depressions.
Consider both traditional "square" Box Blades and "Rollover" Box Blades.
LINK:
Google
Landscape Rake, used on an angle, would be useful for creating concentrated windrows of small rocks for pick up. But, in my opinion rocks smaller than 3" in diameter are not detrimental mixed in pasture soil.
GET A SOIL TEST, requesting the testing agency to recommend amendments for pasture grass.
Research modern pasture grasses for your area. The latest hybrids are often 50% more productive than traditional seed but do require annual fertilization to achieve the productivity increase.
As woods cover 80% your property, I recommend a Ratchet Rake bucket attachment as your next purpose. The will aid your pasture preparation, as the teeth on Ratchet Rake are good for prizing out rocks and can be varied in attack angle much better than a Box Blade. Ratchet Rake is also good for piling debris, much better than a Landscape Rake. Ratchet Rake removes sod efficiently.
~~~And Ratchet Rake is a premier woods too.
VIDEO:
ratchet rake brush clearing - YouTube
