Here's the setup I use. It's a USB keyboard with built in trackpad. It's Logitech branded and came from Wal-Mart. Probably $20. Works great, I keep the dongle in my OTG cable and the keyboard in my messenger bag.When necessary, I just pull it all out. It's all extremely light so if I have to travel a short distance, I can carry it all in hand. Love it.I just use my case as a stand, and I'm ready for hardcore typing in <1 minute if I'm quick about itEDIT: I was wrong about price, appears to be $35 but I don't remember paying that much for it. Eh, even if I did it was worth it. I use it all of the time and it's quite comfortable. I would recommend it.