Hi Chale,
i have the same situation (cloud servers disabled, itunes installation rights disabled). When I need to transfer files from my work PC to iPad, I use two options:
1) mail it (obvious for smaller data volumes)
2) use WiFi transfer - you need the iPad to be connected to the same network as the PC. I on my android phone tethering and connect both the ipad and the pc to this WiFi. Then just use WiFi file transfer on iPad (supported by many iPad apps like FileExplorer, File Hub, TOP Files etc..). Technically the iPad starts a
FTP server and displays the URL. You connect to this URL from the PC (via FIleZilla, Total Commander etc..)
Maybe you solved your problem in some other good way in the meantime?