Jeffrey Hanson and his nine-year-old son, Billy, left Seattle and they may be sailing to Hawaii or another Pacific island.
Lt. Col. George Bivens says police found a campsite recently used by 31-year-old Eric Frein.
The Pennsylvania Game Commission issued the ban on Wednesday, one day after state police revealed that two pipe bombs were found in the woods where 31-year-old Eric Frein is believed to be hiding.
Lt. Col. George Bivens said Tuesday the pipe bombs were fully functional and could have been set off by either a trip wire or fuse, but appear to be among items that were hastily discarded.
State Trooper Richard Deskis was standing with four Wilmington officers interviewing a woman about stolen merchandise found in a car, when police sources say four shots were fired from down the road. A bullet hit Trooper Deskis in the right arm.
The FBI is at the northern New Jersey home of the sister of the Boston Marathon bombing suspects.
Two suspects in the Boston Marathon bombing killed an MIT police officer, injured a transit officer in a firefight and threw explosive devices at police during their getaway attempt in a long night of violence that left one of them dead and another still at large Friday, authorities said as the manhunt intensified for a young man described as a dangerous terrorist.
Police say they are very close to arresting the alleged second suspect; 19-year-old Chancier McFarland.