Thats not a carbon seat-post its an aluminum one, and I came to the conclusion that a Banjo Brothers trunk bag and a handlebar bag (Probably the topeak tourguide DX) may be enough, if it isn't I'll look into a frame bag. I'm still figuring out what to take, and I may take too many unnecessary crap if I have too much room.
And I'll use the top tube bag just for some small food items and my phone.

And I stiil have some room on my camelbak, even though I don't want to put too much weight on my back, the water bladder will be heavy enough once full.