There may be a council voucher scheme which is probably not well publicised and is almost secret. If you have a van, but use it as a local resident rather than as a trader, you present one of your vouchers to gain entry. The council will give you a limited supply to match the 'reasonable' disposal needs of the average citizen.
Found this out the hard way after filling a rented Transit one weekend. (Scheme administered from main council offices only open on weekdays. FFS.)