I'm not too sure about mowing and throwing. The oats might come up halfa$$ but the clover would diefinitely have a hard time. By mow and throw, did they mean just brush hog a field and spread seed?

Food plots do not alter deer patterns too drastically in my experience (been planting them for 10 years). If the deer are already in the area they will begin using them quickly, a few new trails maybe added. Their other food sources will still see activity, though, just at a reduced rate. If you saw deer in a certain area at certain times last year, you probably will still see them next year, even with food plot.