okay so growing up in AZ I've never done much winter camping but now I'm in N. Ga and I know if I want to camp year round or even just extend my 3 season months to what I was used to at home, I'll need to be prepared for some pretty cold temps. Since I have no idea what I'm doing with guesstimating the climate here and I'm not sure what works best for backpacking, I thought I'd ask a few questions before going out and buying anything. For sanity's sake assume I'm going to stay in the N Ga area and not leave the state.
Question #1: How many layers do I really need early spring/late fall vs dead of winter? I know most 3 season lists I've looked at have undershirt overshirt all long sleeves of course, fleece vest, fleece pullover, winter coat. I assume that changes based on the forecasted weather but if I could get an estimation like say, don't worry about the coat till you get closer to labor day weekend, or take the undershirt until you're sure the low is in the 60's, or any personal habits like that. I'm hoping to just be somewhat prepared. I don't want to plan a trip, look up the weather and realize I've now got to order more gear before I go.
Question #2: At what point is it more fancy than I'll ever need? Do I really need a vest that can block out the wind and beads up water and snow if I'm just going to throw a rain jacket over it all anyway? Money's tight and I am on a budget for all my gear, but I'd rather not spend $40-50 bucks, get out there and start wishing I had spent $80. On the flip side I don't want to spend $80 when $40 would have done just as well.
Question #3: I'm getting a Balaclava and I have beanies and a water wicking wide brimmed hat. I am correct in that I will not need hoods on the rest of my gear and should just save the weight right?
Question #4:I found a winter coat that has zip off sleeves and thought that would be great in cold but sunny weather to improve movement and prevent overheating without getting my core cold and carrying yet another piece of gear. Does this idea really work or is it just some wishful thinking?
Any ideas or suggestions or any tips on things I haven't thought about yet are appreciated. Thanks!

