I have the Samsung official keyboard/hardcover accessory on my white Tab Pro 12.2 and I am very pleased with it. There have been comments that the Bluetooth connection is not working properly on some of the keyboard products but the Samsung one works as advertised. When I bought my Tab Pro 12.2 at the Best Buy Samsung kiosk, they were throwing in the keyboard as a free promotion.
I just went and looked at the 10.1 webpage and see that there is no 10.1 version of this accessory. All I can offer then is that the Bluetooth keyboards do work. But for your 10.1, it will have to be an aftermarket solution.
I can recommend the Samsung Book Cover. It is very much like the the iPad accessory. The flap is magnetic and turns the tablet on and off when you open and close the flap and it has a back cover case that also protects the corners. I'm not very confident that it would protect against a hard fall. These large tablets are very fragile with the big glass surface.
Brian