All the Longview Fibre land is now owned by Logview Timber Co in Canada. They require an event plan and references + 2 million worth of event insurance to use the land if approved by the corprate office in Canada. I hear chances for approval are slim for something like airsoft due to liability issues.
If you currently hold a use permit from LF I would urge you to contact LT to make sure it is still valid.
They state that they will send the police and press trespassing charges if they catch anyone up there airsofting or paintballing w/o a permit.