If the 70+ degree day is abnormaly warm for this time of year and it's been much colder before today that temperture swing most likely will have the does closer to a water source during the heat of the day and guess what...thats where you'll find the bucks. They will probably be in that field later in the evening and most likely after shooting light. Seen it happen way to many times!
If it were me I would find where they water and hang out there.
If the water source is close by, get in your stand!