I have a very thin inexpensive smart "case" (covers front and rear), just to keep down any scratches. I love it, it's light and still offers a minor degree of protection. I use a Bluetooth Apple keyboard, the old one before the magic keyboard, and have that keyboard in an origami case that works awesome with the IPP (even left in the smart case) when I need to use an external keyboard. All of this is carried in a messenger type bag that I've had a few years and has carried all my past IPads/keyboards/phones/cables. I have an inexpensive film screen protector that looks and feels just like the screen glass (just put this on to protect from any grit scratches that could occur from using outdoors).
I really love my set up, sure there's a ton of cases that offer great protection (but are bulky) and there are many keyboards that function as cases, but I really wanted the feel/weight/etc. of the IPP with just a tiny bit of protection from scratches.