^^What he said. I've seen it from both places now, plus the division. The whole "swing with the wing" is pretty much myth. Do gun squadron Marines go on long humps or do lots of organized PT? No. They rarely if ever have time. They work pretty much 0700-1700 or 1700-0300ish on a good day. Twelve on twelve off on a harder day. Maybe a half hour to an hour for noon chow. Working Saturdays or even 7 days a week is fairly normal. Say once a month or so on average. This is in garrison. Most folks say it gets better on deployment. I think that's just an illusion. They work just as hard if not harder when deployed. They just don't notice it because there's nothing better to do.
In a "ground" air wing unit (MACS, MWSS,IPAC, etc) it's 0730-1630, 5 days a week with an hour+ for chow and PT. Squadron PT/field events are fairly normal. The downside is lots of dets for a month or two with a much higher pace of work. More like the grunts than the "regular" air wing Marines.
If you think as a division officer in a gun squadron that you'll be leading humps or doing the O course, think again. It's all we can do to get them time for the range, MCMAP, and NBC. Often those things (and unfortunately the Marines cutting scores) often lose out to getting up jets.