I've been thinking about the guy with the suitcase again (who here hasn't?), and a couple things came to me.
It seems that several people have mentioned seeing a strange man walking in town, but has anyone mentioned seeing a vehicle they didn't recognize? I haven't heard it mentioned anywhere, but the majority of the guys I know would probably notice a car that didn't belong than a person (in an area so underpopulated.)
Many farmers/rural residents I know here very seldom go into town, especially if they raise their own food and animals for food. When they do go to town, they often don't bother cleaning up much because they're just going for hardware, lumber, seed or whatever. I've seen guys I knew fairly well who were dressed up for a funeral or something, and they looked like totally different people.
The same thing is true for someone who shaves after having a beard for years, colors their hair (or stops) and starts or stops wearing glasses.
Okay, too late to make a long story short but... Is it possible that this guy was a local who seldom goes into town, and usually has work clothes, some kind of hat, shaggier hair, full beard and glasses, but cut his hair, shaved and put on a suit to do this? If he drove to town and parked his vehicle where he wouldn't be likely to be seen but it wouldn't draw attention, it would explain why he was walking at that time of day rather than driving.
Once he was done, all he had to do was change back into his usual clothes, let his hair and beard grow back, and go on as if nothing had happened. If he wasn't around much, it's unlikely anyone would notice his absence while he returned to his former self.
Sorry, it's all I could come up with.