I don't know the KU5200 that well, but there is a lot of modularity to how you can attach a Tara.
There are no internal pockets. I try not to go overboard with complexity. I carry all of the little stuff you are talking about in my Kit Bag. You can get to whatever you want without breaking stride that way. I do have a ziplock with a couple of smaller things that lives in my Tara, but they aren't things I need to get to very often if ever.