Sadly updated this hike for the worst of reasons, the fencing off of the fire tower on Labor Day weekend.
Lots of bad info on this one – you still can access the tower, it is NOT completely closed off. However, you can only go up when the tower is actively being manned, which is during times of drought during the day.
To not be disappointed, visitors to the fire tower can call NJ Forest Fire Service Division B Headquarters to find out of the tower is manned. The number is (609) 726-9010.