For a spring planting you might want to consider planting 40-60 lb/acre of oats then overseed with the clover. I've done it both ways, and each works. I've read that oats or rye physically and chemically surpress competition of weeds. I'd suspect it also somewhat slows clover growth as well, however by the time the clover really gets going, the oats will dye out, and the clover is left as the dominant crop. They also provide good cover to protect against drought and other weather conditions while they grow, all the farmers around here plant oats and overseed with clover or alfalfa for next years hay.

You should spray 1st prior to plowing. Again, done it both ways, you can get by without spraying if you cut the clover three times a year to thicken it up - once the oats are off. You will still get some weeds, but remember its a deer plot. We then broadcast the oats, fertilize and/or lime, and lightly disc them in. Next we broadcast the clover and use an old cultipacker to firm up the seedbed.