If you're going to carry a tablet and a BT keyboard, you might as well just get a light Chromebook instead. While I can run Linux locally via crouton, I mostly just SSH into my workstation and resume my screen sessions.
Depends a bit on how small you can get a chromebook. After all, the smallest tablets are in the 7-8" screen range, while most chromebooks i have seen are 10"+.
And it also depends on how small a keyboard you feel comfortable with. 11" screen size with corresponding keyboard is about as small as I can go and still type at full speed.