McKENZIE BRIDGE — Loggers regained full access to a controversial timber sale Wednesday by pulling apart a roadblock that environmental activists installed on a forest road that leads to the sale. The loggers arrived around 7:20 a.m., attached a chain and a haul hitch to a pickup truck that was part of the roadblock and pulled it out of the way, said a protester who goes by the name North. For two days, he had been on a platform 80 feet up in a tree, supported by a rope anchored to the roadblock. Protesters on the ground Wednesday morning yelled at the loggers not to move the pickup truck, warning that doing so would put him in danger, North said, but they did it anyway.