I find the opening statement about this case to be kind of strange.
Why is there no detailed information about the "friend" whom several have identified as Randy. Surely if he is around, his statements are extremely important. If Randy too is missing either way, this is very crucial information, why post this and keep that part dark?
A lot of important details have been left out, like the status of the hunting bow. It could be that LE is still withholding information to get a conviction after this length of time, but why tell us he stopped to buy a pack of small cigars?
There are very few details to go on here. I have been in that area, but do not live there. As a matter of coincidence I'm aware that back in the late 70's and early 80's that there was a lot of Marijuana growing in that area. At least 2 other people have posted about this. There should be some history of this area between hunters, bikers, growers and other events. I'm also aware that some people (from as far away as Chicago) would go up to that area to have satanic rituals.
The friend would seem to be the #1 clue and POI.
Beyond that:
1) Accidental death - The friend would likely be the determining factor here.
If so, his bones are out there somewhere.
2) Murder and cover up.
This would become a matter of who, why, etc...
of the possibilities mentioned, after this length of time someone would have to come forward. not likely, but it happens.
3) Decided to run away.
Doesn't seem to fit.
4) Abduction
Seems like this would just wind up being murder.
I'm not clear on the stuff about the tires and hub caps. The way I read it was that the old tires from someone else's car were found (could those tires not be traced??) along with the nice hub caps (which is how they correlated them to his car). What I'm not clear on is how long after this day he drove up there was his car found? Was it only 1 day? That's a pretty short time period for someone to stumble on the exact make of vehicle for a tire swap out in the woods. That's too fishy. But I would agree, the tires were ditched by someone local.
I'm leaning towards Murder because of the tires and the short time interval to find the car stripped. Just off the top of my head, this is what I would want to rule out:
1) Wrong place wrong time Murder:
OK we have; possible gangs, bikers, satanic types,
random criminals hiding out in the area, pot growers, and possibly
Winnebago or other Native Americans in the area.
2) Friend of a friend murder.
OK, is this friend missing or not?
Who did he know? Maybe the "friend" did it.
Maybe a friend of a friend did it.
3) Hunting accident cover up.
Since it was deer hunting season, some idiot, known or not
could have shot him thinking he was a deer and covered it up.
Back then, hunters in Wisconsin were only starting to wear orange gear.
A lot of people from Illinois suburban areas would make the short trip to this area to "hunt" once a year. I recall hearing Wisconsin sportsman complain about it and actually hunt much further north because of the dangers. Check the records for annual hunting accidents in this area. But then again, if the tires are connected to the disappearance it does point to someone local. Seems to me you could figure out all vehicles where those tires/rims would fit. And then track the old disposed tires to their eventual owners. For example, if the tires were sold to a gas station in the area it would narrow it down. OK, it is very baffling that someone would take tires and a battery but not open the glove box. In a hurry? Really dumb? both?