I went a week without checking on my cows.. its rare that happens, but I could still see them from the front porch. It's true that the day you don't check is the day they do something stupid (and they always find a NEW way to do something stupid too!)
The more often you're with them, the better they'll know you, and that can mean a lot if you ever have to do something... bring some sweet feed or some other goodies with you, they'll start to know your truck and you, and if they ever get out, just go clang the bucket a few times.. even if they don't come running, there might be a moo here or there to tell you where they went.
At an hour away, I'd hire someone as close as possible to the pasture to at least give a look around and see if anything is amiss.
Calving time I check at least a half dozen times a day.. it's a lot more than many people, but I have had a 0% death loss over 150 calves (birth to weaning), so it does pay off (though I'm not sure if it pays). Now that I said that I'll have a miserable calving season next year!