As far as I know they are on public land (state). All I know is they are near an old building you can see from the main road on the opposite side of a wetlands NE of Clear Lake. My father is not interested in them at all. They might have something lost under their seats, on the ground around them or in the old building(s). I have always been curious about them but rarely make it back out that way. If you look up Topozone, yahoo maps, or Google earth the area I beleive he mentioned them in is due south of the old gravel pit which is due south of the town of Waterloo. There appears to be a reflection from something in that area on a spit of land near the wetlands. More than that I can't tell you. The only thing I want is to know what is found. Same with all the rest of the Michigan posting I've put up.
As for old cars, there is supposed to be a Rolls stuck in upstate NJ near a closed down resort. It still has the bullet holes in it from the murder that occured in it. Lost track of the friend whotold me about it. Supposed to be the caretakers house near the old resort. A land slide makes getting the car out an impossibility without a helicopter. Next time I talk to him I'll get more info.