Premier season ticket - £1,723.00 per year.
Badly maintained, one way system not clear
Horribly expensive. You're better off parking a few streets away where its free and getting some exercise.
There is lots of free on-street parking around Harpenden town centre. Be careful to look at the signs for the parking bays though - restrictions apply. Time limit is variable, from 30 minutes to 2 hours. No return within 2 hours.