Hire a Fully Equipped 4WD From Overlander 4WD Hire. Overlander is an Australian owned and operated business, with a sole focus on creating unforgettable 4WD travel adventures. Based on the Gold Coast, Queensland, with depots in Brisbane, Sydney, Cairns, Darwin, and Perth, they offer quality 4WD campers to help you explore Australia's iconic destinations in comfort and style. 10% discount applies to hires over 14 days for your tour with us. This deal is exclusive to Australian 4X4 Treks and Overlander 4WD Hire (conditions apply).