Just an update... Wanted to get it up to Kenmore, but my auto insurance towing meant I needed to stick close by. Took it to Morgan's based on suggestions here. Unfortunately, looks like it's a blown head gasket.

$2000 is not worth it for a beat up old car like ours.
RIP Chevy Malibu. If anyone knows good cash for junk car places, let me know, but I've already been quoted $0... just the free pickup.
Thanks for your help, folks - wish it were better news. My family will be one car until we save enough for a used 4wd SUV. Whenever we get there, the next auto will be a 4wd SUV for getting up in the woods... that's the good news!