Great question and one I get a lot!
Here in Michigan our DNR added an early antlerless season in September for management units that were over goal and on private property only. As a deer manager this season is a wonderful tool for a number of reasons.
1) it allows me to take does with a gun prior to the archery season (Oct. 1) so they haven't been pressured and they're easy to pattern. High shoulder shots and there's little if any tracking.
2) it's much easier to identify does from fawns which equates to less BBs being mistakenly harvested.
3) you remove another eating machine from the landscape that would otherwise consume forage reserved for deer you wish to carry over.
4) it allows me to get a jump on my doe quota early which allows me to hunt bucks in November without the pressure of my responsibility to take does.
5) because Michigan allows 2 buck tags most hunters shoot the first buck they see "for venison" and then "hunt for horns". Taking does early puts venison in the freezer and eliminates the "need" to shoot young bucks for venison. We refer to young first bucks as "Mulligans".
6) removing does early (pre-rut) creates more competition between the bucks for the available does. In turn this creates more daytime buck movement and an intensified rut.
Michigan also has a liberal tag structure when it comes to does so many hunters hold of until after Thanksgiving to shoot them during our gun season or December to take them with ML , archery, or some of our late antlerless areas. As I mentioned earlier it's difficult to ID BBs later in the season and it's not uncommon for some of our bucks to shed their antlers in Dec. making them vulnerable to antlerless hunters.
I always recommend to guys that are experiencing high deer numbers to shoot does when ever they stand still long enough to pull the trigger. Getting doe numbers in check is the single biggest obsticle, IMO, to sustaining a health QDM herd and when guys get serious about it the rest falls in to place.
Our co op has been in place now for 8 seasons (since Nov 01). We have hammered the does to reduce our overall numbers at a rate of 5:1 (does:bucks). We still have neighbors that are exclusive buck hunters so we still need to lean heavy on the does but not like we have in past years. I have taken 30 does (5 bucks) over the last 5 seasons including the 4 I took this year, which is half of last years total.
A very effective technic we employ when harvesting does is to ID the alpha doe in a family group. Once the alpha is identified we take the high shoulder shot and try to drop her in her tracks. As long as she doesn't run off the rest of the group will stand around waiting for her cue, we then try to ID the beta doe or a doe fawn if neccessary, and aim for the shoulder again. I have taken 4 doubles in 2 years using this technic and 1 of those doubles could have been a triple if I would have had another tag on my person.
Our local QDMA branch pays for processing of excess venison for any one that wishes to donate their deer. Last year we donated over a ton of boneless meet to our local food bank. I personally give most of mine to friends, family, and coworkers, but I also give to the foodbank. It's definely easier when those options is available.