If you own snow mobiles, you may consider contacting your local emergency management office. They may like to have volunteers that would be willing to help out. Especially in areas where severe winter weather does not occur more than a few days on average over a few years.
Most places won't do this, but at least if you're part of emergency response before hand, it is really unlikely your equipment could be "borrowed" (with "just" compensation ) during a local state of emergency.
Best to keep them out of site so they don't get "borrowed" if that bothers you any.
Nobody is coming for your snowmobile.
Nobody is coming for your duck decoys.
Nobody is coming to take your {insert treasured object here} in a snowstorm.
If you have stuff that might be useful in an emergency, you have likely already been contacted and are already on an emergency plan somewhere. If you're not and you want to be, a letter to your municipality might be in order. they would welcome it.
In my planning book, I have arrangements with a lot of people. As a result, I have 10 backhoes, 8 dump trucks, 20 ATV's, 10 boats, at least 1 20 ton crane, 100 portable toilets, 5 generators, a complete portable kitchen, three sources for propane, diesel and gasoline, 8 ham radio operators and a notebook full of other stuff...all preplanned and redundant for a postage-stamp sized bit of Northeast PA. I'm just a volunteer Emergency Management Coordinator. The professionals are far better equipped than me. If we need more help, we'll ask, no question about it, but the reality is that part of your planning process is letting human beings act as human beings - and right here in PA, when Interstate 78 closed with similar winter weather, trapping people on the road for 3 days, the locals came out on snowmobiles, without central management directing them, and brought food, water, fuel and sanitation equipment to the folks trapped on the road.