Hey Mike... Sounds like you don't need any advice..I think your thinking is basically right on.. I would first spray it with a nonselective herbicide (round-up) and try to burn it off like you mentioned and then work it up with your four wheeler. Once you spray it and the grasses start to die their roots will shrivel and let loose of the soil making it easier to work up. Then like you said plant in mid Aug. and there you have it. Like I said I think you have the right idea. If the PH in your soil is right you should be successful. As for keeping the grasses out from year to year you can either mow it a few times a year or use Slay herbicide which comes from Whitetail Institute which I think is the same distributor you got your clover from. It will kill back your grasses and weeds and leave your clover alone. Good Luck