I will definitely try the vapor barrier method probably starting with bread bags just to see how they work for me. No way I want plastic boots which leaves me off some AMC hikes, unfortunately (yes, some of these old-school guys are still insisting on plastic boots but I'd better not go there ...) I'll check out Zappos because there are no stores that I know of where I can walk in and try on boots. I'm in Southern California right now.
A few suggestions, consider vapor barrier socks, you can get rid of a lot of bulk if you uses VBLs. I have a nice new pair from RBH designs that look good and feel good. I just wish I had them when I ordered my boots as they do take up some boot space. FOr cold weathe multiday trips VBLs save a lot of evening boot drying.
Whatever you do bring your gear with you to the shoe store and make sure everything fits either that or order them from somewhere with free returns like Zappos.
Some folks can tolerate the older sorel boots but there are far better choices out there.
I had plastic boots and snap on crampons, I used them on occasion but realistically they were overkill for winter 48 hikes. For most people, plan on them cutting your mileage per day by 20 to 30%. They are uncomfortable and make for an odd gait whihc get tiring. Especially with the recent low snow winters, they are miserable on bare ground.