RE: starting a food plot
3 acres is a great size for a foodplot - It truly will make a difference - even with alfalfa nearby.
The first year we planted clover - the deer went nuts on it after Late August. It seemed that when the farmer neighbor did his last Alfalfa cutting (2nd cutting for usually) 20-30 acres - the deer moved off the brown fields - and hammered the clover. It held deer every night for 2 years in the fall. Then the farmer started using Alsike Clover to rotate with Corn - and the deer were not as hot for our clover - but still come by often enough.
Alfalfa is a great crop - and deer love it - but after a few frosts they tend to go for the more green plots like white clovers. Clover is also an easy plot to care for (mow) in the summer months. Having it around year round - really gets the deer used to using the property as a core area.
Rye, or Winter Wheat can be OK for fall hunting - but they offer nothing but bedding in the summer - and have to be planted each year.