I am afraid I just picked up 4 military surplus chains.
Socks and the spider/plastic clamp chains are ok for short/slow/tarmac trips but if you get uneven roads and anything which might have rocks/edges they will shred in no time. (obviously not a problem if you have a foot of snow).
We have the same issue in Mid Wales, the extra altitude with a bad winter can royally screw it up. They are a useful tool to have for the rare occasion.
Give LR a call and get their recommendation, often there is useful info from them