I've gone over a month without firing a cylinder. Bike, walk, and living close to the stuff I do. Being an anti-social hermit homebody cheapskate helps too.
I once just plain didn't use the F150 for IIRC eight months- I think it was when gas spiked to $4 the first time. Some of the electrics went all wonky because of it so I spent a weekend trying to track down the fault that caused my gauge panel to spaz out and the cruise control to not work. In the end I fixed it, but I don't know where the fault was. I figure I accidently restored a bad connection somewhere simply by disconnecting and reconnecting it. My theory now is
newer vehicles are better off not sitting so long as the vibrations and whatnot from use help keep electrical connection continuity. However, the old stuff like the '59 or the '66 Vair can sit for years and start right up upon battery install. As proof, I haven't let the F150 hibernate for that long again and it hasn't had a single electrical issue since... well, except for getting new starter brushes.
STILL has the factory battery!
I still record fills in my paper logbooks but have slacked off on updating the EM logs for quite a long time. My vehicle usage patterns are very, very inconsistent with some months of no driving then suddenly some 1000+ mile trips. I've logged 'em long enough to know what to expect anyway.