Renting a multi-seat van also aids in maximizing fuel savings. Don't stop fuel conservation efforts upon arriving to the destination. Combine errands into one trip rather than taking multiple trips from your hotel or campsite. Organize stops so they're near each other and reduce retracing the same path. Also, plan trips so as to avoid congested times of day.
Less traffic makes for smoother driving conditions.
Don't be idle too long. Also, don't let vehicles idle while waiting for someone. Idling uses more fuel than turning the engine off and back on again. Choose an inexpensive, nearby vacation spot. Instead, take a weeklong trip to a state park or a theme park.