Not sure on the Hankook's as my XLT came with the Goodyear Wranglers. We just had 12 inches drop throughout the day and the roads were NASTY. Put the Drive Mode control into "Slippery" (4-high) and had no issues driving through town and on the unplowed highway. Yes, still gets a little...
Just installed the Gator HR1, rolling "hard" cover and am very impressed so far. Originally I was going to go with a retractable with integrated grooves/rails for a Yakima rack but backed off for a couple of reasons:
Takes up bed space when retracted
More expensive
More difficult to remove when...
Let me know if you get one of these kits. I am curious about their ride quality. The Rough Country 3" with remote reservoirs and new A-arms is also one that I am researching right now. You in Rigby ID? Not too far from you in Bellevue, Blaine County.