Use the tranny to brake! I watched a van turn sideways in front of my house a couple of years ago. A pickup truck, 4WD no less, started down the grade and locked his wheels. He sloooowly slid into the side of the van! It would have been no problem to downshift and steer around the van. Or, plan on what to do at the top of the grade. Here in SE TN, it is thought that the faster your tires spin, the better off you are. Even if you don't move. FWIW, I was born and raised in OH so snow and ice are nothing new and never created a problem for me.
My wife gives sound advice. 99% sound and 1% advice.