Thank you for asking hannah. No, I don't think he hitchhiked, I think Israel Keyes could have been touring Portage Lakes State Park for any number of reasons (pit latrines, boating, hiking trails, random tourists etc), as he was in the area during this time period.
http://www.fbi.gov/anchorage/press-...he-publics-assistance-concerning-israel-keyes
BBM
And came upon Dennis. They had many things they could talk about, handyman business, stump-grinding, the economy, boats.....
Dennis was supposed to be at Portage Lakes State park on the 19th to assist his mother with moving a boat, but never showed up.
http://www.ohio.com/news/family-baffled-by-medina-man-s-disappearance-1.193932
IK is known to take the victim's vehicle and leave it parked in a public area near where he abducted them from. Dennis's truck was found at the Subway down the street.
Dennis had cashed in some gold before he disappeared and was thought to have about $11,000 on him, a nice payoff for IK.
Dennis was a single man, less likely to be missed or searched for diligently; another stated IK favorite.
And the location the body was found in Stacyville is a mere 35 miles south (straight shot up I95) to two of his sisters; he posted photos of him helping build a cabin for them on his website.
https://maps.google.com/maps?oe=utf...gl=us&ei=4NzSUZ76LsPQrQeUnIDgDg&ved=0CI8BELYD
The part I can't work out is the time difference between the abduction and the location of the body. I don't think IK had Dennis riding around with him for several months, only to dump him in September, and if Dennis went willingly I'm certain he would have called his mother, father and brothers to tell them where he was so they wouldn't worry. Another option is that he killed and dumped him almost immediately and it was cool and damp enough that he didn't decompose as quickly as normal, therefore the ME's time of death is off....
Sorry to be so long winded. And graphic.