Yeah, leave the Jeep parked. I don't think it will drive on top of four feet of snow or through four feet of snow. But then, I haven't tried to do that so who knows.
If you have about 10" tires and air them down really well-5 psi, you can usually get on snowmobile trails and just go if the snowpack is cold. If it warms up above freezing while you are still on the trail, you can have a major problem.
I used to do that in the late 60's and 70's but there weren't all the travel restrictions we have now. I was a good 20 miles from the road on one of those adventures.