Opeth vocalist/guitarist Mikael Åkerfeldt is featured on The Vintage Caravan’s new song “Philosopher.” You can check that out below. The Vintage Caravan‘s new album “Portals” will be released on September 26. Bassist Alexander Örn Númason commented: “The Vintage Caravan proudly present our new single ‘Philosopher‘, which features none other than the amazing Mikael Åkerfeldt from…