I remember those Ice Storms....went through several when we lived in Huntsville.
Just be sure you have plenty of propane and fully charged batteries to keep everything going. I'd have a couple spare tanks just in case travel is impossible.
If the power goes out you may need a small generator to keep batteries charged sufficiently to make it through the cold nights. All your heating and lights in the AS need 12 volt
Another consideration is some shelter so the AS entrance door will not get iced over and frozen shut. We had that problem on our back door of the house--had over 3/4 inch of ice coating the wall and door, plus snow on the deck. Could not get the door open from inside with any reasonable force.
Rich, KE4GNK/AE, Overkill Engineering Dept.
'The Silver HamShack' ('07 International 22FB CCD 75th Anniversary)
Multiple Yaesu Ham Radios inside and many antennae sprouting from roof, ProPride hitch, Prodigy P2 controller.
2012 shortbed CrewMax 4x4 Toyota Tacoma TV with more antennae on it.