This is what I got from NJMP
…Friday we will have competition practice (own karts) from 1pm – 7pm. Saturday we will have comp. practice from 9am – 1pm and right now we do not have comp. practice on Sunday. We cannot run comp. karts (personally owned) karts on the track with our rentals at the same time and we do not have tag karts for rent. Sorry! If you would like to set a reservation to guarantee your time, let me know!