Ted,
Before you buy new check thrift stores and if you're not in a hurry, yard sales.
Thanks to your help reinstalling the trans, we had a great time in Yosemite and I got to ("required" on our 2 wd, but it's a Jeep w/snow tires so it "must" be 4wd) use our chains for the first time ever. We used some with cables for mounting and real chains over the tread. Seemed to work fine with much deeper gripping than cables alone without the problem of wrapping limp chains around the tires. Install your chains, drive a bit and tighten them up. With the deep AT tread pattern they "settled" way in and needed to be two notches both inside and out on both tires.
Chain requirements were (IIRC);
1) Some snow / ice, 2wd chains on drive wheels only. 4wd, not required.
2) More show / ice, no 2wd drive allowed. 4wd w/full snow tires OR chains on rear.
3) Deep snow / ice (the road will probably be closed anyway) 4wd w/full snow tires AND chains all around.
We took an old 1/2 inch back packing mat which made installing / removing the chains much nicer.
Mike