I make it a point when driving through NJ to fill up with gas before crossing into NJ (or making sure I have enough to get through it).
I made the mistake once of needing gas on the NJ Turnpike, stopping at a rest area and having to wait for 45 (yes FORTY FIVE) minutes while the ONE attendant operating both sides of a single pump slowly worked his way through a massive line of agitated motorists. Never Again.