Hibernation takes up as much space as RAM you have. So you could be very low with 60GB allocated.
Probably need to install more drivers after you installed Boot Camp 5.x set.
If you can, use wired first to get all the drivers and updates, with just basic install that will leave you short of important and critical updates.
Never assume your RAM is not an issue until tested, the Windows 8 has memory diagnostic which is quite good.
This tech article only deals with install phase.
MacBook Air (13-inch, Mid 2013): Keyboard and Trackpad may stop functioning during Windows 8 install
The keyboard and trackpad on MacBook Air (13-inch, Mid 2013) computers may stop functioning at the Personalize step when installing Windows 8. This occurs if you are using a USB 3.0 flash drive to install Windows 8 or the Apple Support Software (Drivers). USB 3.0 flash drives can usually be identified by a blue insert in the USB connector. Use a USB 2.0 Flash Drive instead to work around this issue.
Boot Camp: Thunderbolt devices not recognized after Windows 8 upgrade