I have never been a advocate of the reality TV shows but nothing here has proven that Storage Wars is fake. I am not saying the show is real but a link to a article doesn't mean it is fake. I am guessing, like most reality shows, it is part scripted and part reality. I do think these guys probably do not know what is in the storage before they bid on it (whether the money is real or not).
Wiki has a small section about this and it:
Criticism
While some have speculated that some of the units have been stocked by producers, an A&E publicist said, "There is no staging involved. The items uncovered in the storage units are the actual items featured on the show." Executive producer Thom Beers has stated that the vast majority of the storage lockers investigated during production contain nothing of interest and therefore do not appear in the final show. Beers has explained that the series avoids delving into back stories of the lockers' original owners because, "All you see is misery there, and I didn't want to trade on that