Those of us that live in the hotbed of CWD in Colorado, the late rifle season dates plus increase in buck/doe tags has done absolutely nothing to prevent or lower the prevalence of CWD.
From my point of view, this management strategy has done more harm than good. It's been almost 50 years since CWD prions first hit the soil in the hotbed of CWD in Colorado and I see mature bucks and does doing just fine....especially in years where there were more mature bucks in the herds. In fact, with the lush shrub and forb browse growth I've seen the last 2 springs, I've seen more twin fawns than I've seen for years.
Below is a photo of one of many old age class monster muley bucks that has survived CWD on the Arsenal near Denver where CWD existed in the concentrated high fenced area since the 1980's. Living proof that even though CWD prions have built up in the soils for 50 years mature bucks survive.
The mature buck below likely spreads his genetics with CWD resistant allele genes to the herd. This is almost the opposite management strategy of what the CPW has conducted here in Colorado. Mature bucks that live through CWD offer the best genetic material in the entire deer herd! CWD prions last for centuries in the soil. The CPW could harvest every deer in a herd and there will still be CPW prions in the soil.
Predators and rough winters often take care of the few sick CWD deer that exist, leaving healthy deer that have survived years of CWD prions in soils to survive.
I'm pretty sure there has been an outcry by the public in Colorado against culling and harvesting older age class bucks for the sake of CWD....it aint working! My guess is that the late rifle season dates here in Colo will likely be eliminated in the near future.