I have a little time in both the Chugach and Yukon jackets. This year I'll be running with the SD jacket and Chugach for 90% of my bow hunting.
The Yukon is great if it will be raining or snowing a lot, and can rock all day wet weather and wind without a problem, but it is a bit overkill for early season in my opinion. However, if you only want to get one or the other I guess the Yukon is your best value for use the whole year round.
Both jackets are strictly wind/water breakers, and provide little insulation benefit so you will need a good puffy layer.
FYI. The Chugach pants are also well worth the money. Light, packable, and worth taking on your hunting trip. If it is going to be raining, don't hesitate to put them on over just your base layer and hammer all day even in the early season. They'll keep you dry and breath well. The leg zips come all the way up to your hip bone, so its very easy to regulate ventelation as well.
I was also really surprised with how well the gear actually dries out, even overnight in a wet tent.