I've got a mile of gravel road that goes up and down two hills, one very steep and one moderate. In both cases there is a nearly 90 degree turn in the middle of the grade - the road was dictated by an estate settlement, not common sense. It is a lovely forest drive when there is no ice or snow. Ice and snow are bad. And, since the drive cuts down the side of a hill in most cases, sliding off would probably mean a roll-over or total loss. I have chains for all four wheels of my F-150 - loaded with firewood, and two chains for my old Jimmy 4 X 4. My wife drives a Subaru Outback that is fine in a few inches of snow.
I have to take any snow off the slopes asap because running over it will pack it into ice quickly. Chains work with most ice, unless it is very cold following ice over snow. I've slid about 80 feet with good, square cut chains because they could not find a grip.
My response is pushing snow as soon as it accumulates. I also have a drive that is somewhat wider than average so I can scrape it down to the gravel - picking up gravel but moving it into a pile still on the gravel. I come back after the melt with a box blade or grader blade and put the gravel back.
I have also carefully placed large logs along the downhill side of the road along all my drive. These logs, average about 15 inches diameter, are held in place where necessary with locust stakes pounded in behind them. Actually, when there is ice, they are frozen to the ground anyway and won't move.
Since my sliding is usually quite slow, sliding out and bumping one of those logs will bounce you back onto the road and you can slide on down the hill. I believe I'd have to be going pretty fast to go over the logs.
When I have ice on the hills, I also attack it with my ratchet rake. I just run up the hill, put the blade down and back down to bring up gravel. It tears up the gravel, but gives you traction. Then I go back after the snow has melted and smooth it over.
Generally we only have a few really bad times each winter here in Virginia, and I also just try to not go out. If I have to, I park the Outback at the end of my drive and take my truck out to it - with chains on.
All that said, I am planning to buy chains for my little CUT simply for extra traction when I have to work ice. I have an indoor place to mount the chains, and will probably hold putting them on any given winter until the first weather forecast that would make me think I'd really need them... Then leave them on for the rest of the winter. Some winters that might mean I never put them on.
Living in the county with a long, hilly, curvy drive means you will never have an assured solution to egress under all conditions. You just work the storm and accept the problem as the price of living where you want.