Our buck harvest limits are very liberal, because the land is family hunting, with several of the hunters coming in from out-of-state and only getting 5 or 6 days of hunting for the entire year. The buck "rules" are: Any buck as long as it's 2 1/2, except for new hunters (then anything with antlers). If a second buck is killed, it must be larger or older than the first.
Now these limits don't mean everyone shoots the first 2 1/2 year-old buck they see. The out-of-state hunters generally do because they have so little time to hunt, but the in-staters are generally a bit more picky. Over the last 20 years, our buck harvest has been 11% yearlings, 50% 2 1/2, 24% 3 1/2, 10% 4 1/2, and 5% 5 1/2+
And no, we would not change our goals with CWD present. Our goal is to produce a "normal" buck age structure and for our region/habitat a normal buck age structure would be 10% of the antlered buck population being mature (4 1/2+), and so far, so good.