I got stuck in about 3 feet of snow in March, I used the rear bumper(Make sure you are under the tow plate). There is a fender attachment you can buy for the Hi-Lift.
As for the front, I took the air dam off, and the radiator scoop, so I caould more easily access the undercarriage, and get a higher approach angle. with the high lift, I used the (gasp!) front sway bar. I was goping to lose my Explorer over the side of a hill, so we wrapped a chain through the sway bar, connected one end of the Hi-Lift, and hooked another chain to the other end of the Hi-Lift, and connected it to a tree strap and tree. The jack was in mid-air, and we used it like a winch. Slow going, but steady pressure.
LiveOakPrk@Mobsters.com
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'95 4x4 2dr
31x10.5x15's on 15x7's
K&N