According to Official Guinness Records,
The most people crammed in a VW Campervan (Classic model) is 50, achieved by Comfort Insurance (UK), in Malvern, Worcestershire, UK on 5 September 2015.The attempt took place at Busfest a specialist VW Van Festival.
For a complete list of 2015 records, please visit 2015 Guinness Records in United Kingdom.