Tracked down a battery parasitic draw by testing every fuse for voltage drop. Battery was completely dying in 48 hours. Ended up pulling fuse #74, which is labeled as 'Telephone'. Didn't lose any electronic accessories by pulling that fuse (because who needs 'phone' these days?), but stopped the draw. I'm losing about .10 to .2 volts per 24 hours now. I can live with that.
Also spayed the underside with
Carwell rust inhibitor. It's the second winter I'm putting this stuff on, and it seems to be working great so far. Stuff is good for rubber and electric components as well as for metal.