Sorry RobA, I didn't understand what you were trying to accomplish until I reread your post. To properly create a hay meadow & grazing area you may have to wait until next year. First step is Roundup the area early fall while grasses are still green. Then essentially farm it. Run a plow over it this fall. Then a disc. Then a field cultivator. Early next spring re Roundup the volunteer stuff & re disc & cultivator. Get your hands on a cultipacker & roll it. Put out your seed at the proper time & re cultipack. I've done this a few times with good success. I borrowed a neighbors plow & disc. I paid a neighbor to run his field cultivator over it. I bought a used cultipacker at an auction, fixed it up & used it. Lent it to my neighbor with the plow, etc. & figured we were even.
Good luck..du