At parts of Redhill (esp where I fly from, Hangar 8) road vehicles share the taxiway in front of the hangars. So, yes, vans do use the airfield .. so do bloody great wagons !
The road to the control tower and the taxiway are also one and the same.
Indeed one of the runways (07 - 25) is part of the old perimeter road - and only as wide.
Joining Procedures - Redhill Aerodrome