Buy yourself a pancho liner if you aren't issues one. I found myself using the green sleeping bag in combination with the pancho liner during the summer nights spent in the field. I can't say how effective the combo would be for the winter months so you can try it for yourself and find out.
Personally speaking, I hate MRE's and as a result, I found myself taking 2-3 MRE's (minus the main meal) at most to the field. This just comes down to personal preference so you'll have to try it out and see what you prefer. There is no point in hauling all that weight around if you don't need it. Walmart sells this stuff called cajun mix and it really tastes great, so I pretty much lived off of that for a good portion of the time. I also got myself a small bottle of steak sause and used it with my MRE's...it helps the taste.
Most other things just come down to personal preference. If you are willing to haul a lot of weight around then by all means, take everything on the gear list. If you want to pack light and tough it out for a night or two, then do so.
As far as hygene gear goes, there are just a few vital things. If you are in the quantico area, buy yourself the $10 electric shaver they sell at the PX. It works great, its cheap, and prefect for the field. Walmart also sells wet naps, foot powder, toothpaste and mouthwash in "travel" sizes...which just means they are small and easy to carry around. Honestly, this is about all I needed for my days in the field.
So there you go. I'm just telling you what worked for me and i'm sure you'll figure it out when you spend some time in the enchanted forrest.