I haven't tried any ski racks on my Prius, but with the split rear seat, I was able to fit 3 sets of skis, boots and skiers (myself included) into my Prius.
I did have the opportunity to use my cable chains twice last winter. The tight clearance between the tire and the wheel well did make installation a bit more difficult. This was made a bit easier by carrying two vise grip pliers, a pair of garden gloves and a small tarp to kneel on.
The biggest issue I encountered reaching the ski area parking lot was the low ground clearance of the Prius, though by using the tire chains, I was able to ride up on top of the snow instead of bottoming out while driving in the tire ruts. The traction control and VSC did help a lot with control once I had chained up.