I've had friends come up from Texas with dogs that are very good at hunting early season Huns and Sharpies. I've had those same friends come up in December and hunt SD with me. Believe me those dogs did not handle late season roosters nearly as well. In fact their owners were ready to pull their hair out. Totally different situations. Dogs have to know how to handle birds far better. Early season birds are relatively dumb, a lot of young birds. In December they have been pursued and shot at a bunch. Their cover is completely different. Cattails, marsh grass, and thick CRP. If you slam a car door or yell for your dog, birds flush at 300 yards.
What I find very strange is that someone who hunts wild roosters in late season doesn't understand that.
They are far harder to hunt, and will not put up with a dog that isn't mindful of their "spooky" ways. No whistles, no yelling, dogs that stay in perfect range, and are capable of jumping through 7 ft. tall cattails all day. Put up with -20-30 below wind chills.
The dog that slams points in October is not necessarily a great late season dog. That takes maturity and intelligence. Being biddable in silence is the key, as well as a coat that can take the tough conditions. Especially if you are hunting every day for 7-10 days. Completely different. That is why the event would be interesting. Dogs that are used to running in trials in early fall and spring would find it totally different.
Only the hardiest of hunters and dogs hunt pheasants in ND,SD, MT winters. Many people don't go because it is cold, and not as easy. Believe me, I don't normally see a bird hunter all day. There is a reason for that.
Speak kindly to me, beloved master. Revel in my unconditional love, and give me every minute that you can spare, for my time with you is short.