Different seasons, different states isn't really something you cover with a "system". That's kind of just a marketing speak thing.
I'm not going to recommend anything specific, particularly since I don't hunt the L48, but basically you are likely to need a set of base layers, some light pants/shirt, some heavy pants/fleece shirt, a warm insulated jacket or two, raingear, a basic hat and a few different gloves. That would cover half the world at least.
I'm mostly a solid color guy. Particularly for things like pants, hats, gloves, etc. (Seriously, who has ever lost an animal because they wore brown pants that day?) Sitka is usually good, but so are a zillion other outdoor brands.
Not that the Sitka deal won't work fine, but you need to understand what you need and are getting a little better. Backpacking isn't exactly like hunting, but the general idea is the same. Comfort across a range of conditions. Andrew Skurka is a hunter and extreme adventure backpacker and breaks it down pretty well.
Core Backpacking Clothing || Intro: With just 13 items, go anywhere in 3-season conditions - Andrew Skurka