Free: Contests & Raffles.
Don't be too surprised if they completely disappear come mid October. Bucks will shrink their core area in preparation for the rut and will keep their feeding close to bedding areas. This is more of a whitetail rule but I wouldn't be much surprised if it was applicable across the entire deer spectrum.
...The question I have is if you have no bait/salt out right now what is drawing them to the area currently?
You create too big of a bait site this early in the year, you may also draw interest from other hunters in the area. Try to avoid creating competition for yourself unless you have some private property locked up or the only access to your spot.