Thanks for the advice. Now, I can do hard-core homework on each step.
I was gonna back-up my games to .iso so I can play them on PC, and that leaves the USB hdd hooked up to the wii expendable. Then, I can either just use .isos or convert them if anything happened. By then, the Wii U should have been out a while past early-adoption and there'll be a new process to follow anyway!