Inventory management is currently a mess, I use bags to hold stuff like quest items, keys, scrolls, and potions. Not a perfect solution, since you can't just drag and drop on a bag icon, you have to open the bag and place it in a specific spot in the bag. But it let's me quickly sort through a fresh round of looting. There is also "send to camp" for stuff you want to keep but don't need right now. I'ts particularly cheaty if you send all your explosive barrel's to camp till you need them but so be it, it's the game we have right now.
I assume inventory management still has several passes to go through before it's ready.