Do I need to hook up the van to power, water and sewer for everything to work?

No!  All of our vans are “self contained,” meaning everything will work without being connected to power or water.  Each van has its own on board water tank, batteries, generator and holding tanks.  Being self contained, you do run the risk of running out of water and power but this is very uncommon, especially f you fill the holding tank every 2-3 days and typically power is regenerated by driving the vehicle.  If you do want the peace of mind, you can always plug in at a campground with full hookups.