2nd best time of year to call IMO. Right before the does start really coming in is best and right when most have been bred is 2nd best. It doesn't make any difference at all what your buck/doe ratio is. What matters is what your buck/doe in heat ration is. No matter how many doe you have in your area there will be times when there are just enough in heat to get the bucks going but not enough to go around.

It is always a risk/reward way to hunt though. There are a lot of factors to consider.