it's not decided by the track. for HPDE it's a state law. Any of the tracks in NJ should let you drive with the RMR bar for HPDE.
I would check out PDA/NASSA who goes to Thunderbolt which is supposed to be a great track.
Welcome to New Jersey Motorsports Park
Also the Porsche Club of NNJ who goes to Pocono. Though LOTS of groups go to Pocono
I would just call each track and ask when the events are happening and then find out if each ORG allows outsiders
