After the seven-hour drive from Connecticut, Rick and Bill were following Joe Spence’s directions to his camp on Chebuncook Pond: Nutting Road for five miles, then right onto a dirt road marked by a row of mailboxes beneath a stand of birches. Bumping along with the boat behind, they crossed the abandoned railroad line that Joe had noted. Even though he knew the railroad map of northern Maine, Rick had searched this one anyway, a Maine Central branch abandoned over a decade ago. They’d come across it at different locations on past trips. Here, its right-of-way through the woods remained clearly evident, no doubt from snowmobile and ATV use. In another half-mile, the waters of Chebuncook Pond appeared through the trees. They passed two camps and pulled in at the third. Joe’s camp looked like…