Me and my friends have a camp site set up and we have two buses and a hatchback, the hatchback stayed when the server reset but our two buses vanished without a trace. We know they were not stolen due to immediately getting on after the servers went back up. This is unfortunate because the buses are very good looting vehicles with there large storage space. The Off-road Hatchback did not disappear but the buses did so this may be just a glitch with he buses alone.