I am 5'10" plus sized too, and I just got the Damier Ebene Neverfull GM. Love it, love it, love it! Did I mention that I love it? I use mine as a general purse and right now have the sides cinched. It looks fab. However, I have folders, tablets, clipboards and other stuff that I will occasionally throw in if I am going to a meeting and want to simplify.....otherwise that stuff has it's own roller case for every day to save my back.
Now.....when I first got my bag, I wanted to see how much it could carry weight wise. I did an experiment where I filled it to the brim with heavy books. I could barely lift it. I hung it from a doorknob and inspected the bag. There was not one sign of strain on the handles, not a whit! That is darn impressive in my book. So there is no doubt in my mind that your items could easily be carried by it.
The only thing about the Neverfull is that the strap drop is not really comfy for us bigger gals for over the shoulder. The GM does have the longest strap drop, but it is still only about 8 inches. I have read of some people stretching it by loading it heavy and hanging it. I have a feeling that the straps will stretch a little with use anyway, but I doubt that I will ever use it consistently over the shoulder. Luckily, my
Coach Sophias long ago turned me into a satchel girl, I nearly always carry it in the crook of my elbow. Besides.....I am proud of my bags and that is the best way to show them off
So, I would highly recommend it for your purposes. When not in use as a tote, it easily transforms into a more refined bag. Let us know what you decide.