A typical home range can vary in size based on habitat and other factors, but 1,000 acres is a good average. So, if you own 80 acres and a mature buck evenly distributed his time across his home range (which they don't), only 8% of his time would be spent on your land. Assuming a 90 day summer he would spend about a week on your place.
I don't know how many trail cameras you are using or what kind, but unless you are using bait in an area that has poor native foods, trail camera data can be quite biased against mature bucks. Young deer acclimate quickly to a camera flash but mature bucks don't. I learned a lot about this when BEC made the transition from red blob to true black flash. I noticed when I was using the red blob cameras I'd get 1 or 2 pictures of a mature buck and then never again. At one point, I was digitally enhancing a picture triggered by a young deer and was then able to one of the same mature bucks that had "left" on the very fringe of the flash range. I started going though old pictures looking for this and found it was common. Mature bucks didn't leave, they just were suspicious of the camera flash and learned where the trigger range was. After that, they kept their distance from the camera and that "safe distance" seems to be just outside flash range. This issue eventually resolved once I transitioned to black flash. Keep in mind that not all trail cameras advertised as invisible flash are truly invisible to deer. There are a combination of factors in visibility, wavelength, intensity, and duration. I would call many of these cameras more as low-emission flash and they don't resolve the flash avoidance issue.
My guess is that your fall observations are also biased in the opposite direction. During the rut when deer throw caution the wind, they are much more observable, both by hunters and trail cameras. So, while it may seem that mature bucks are using your property significantly more in the fall, it may simply be that they are less observable in the summer.
Of course, many deer do adjust home ranges on a seasonal basis as the food sources, cover, and human activity change and it may be that there are somewhat fewer deer using your place in the summer. However, I doubt the difference is as large as it seems.
Thanks,
Jack