20:1??? If that is the case then you need to start some serious doe management! I dont know how many anterless tags you can get, but start shooting those does. All thoses does are doing is getting fat and eating up all the food source. If you was a 1 1/2 old buck looking for a new home area would you move to a area that had a bunch of does eating everything up? Of course not.
I had a 12:1 ratio in Ohio 6 years ago. I started taking 2 does a year, same with my brother, and dad. And within two years, we have had more bucks and a ratio of about 4:1, which we are still working on.