Copy and paste from website:
You can enjoy a Twin Cabin for two and bring your car along from just $299 each way. That’s a saving of up to $156.
Travel between 17 October 2015 and 13 December 2015.
This offer ends 11:59pm 27 June 2015.
Important: When booking this fare online you will need to select two passengers (adult, child or pensioner). A private Twin Cabin will need to be selected at the accommodation step and a standard vehicle less than 6m long at the vehicle step.
Terms and Conditions
This offer is available to be booked between 12:01am 31 May 2015 and 11:59pm 27 June 2015 unless sold out prior. Offer applies to new bookings from 31 May 2015 for travel on night sailings between 17 October 2015 and 13 December 2015. Based on a standard Spirit fare for a Twin Porthole Cabin. Package price is each way and may be $299 or $359 dependant on availability. Fare eligibility criteria applies: to access the Package for Two offer the booking must be for two passengers (adult, child or pensioner) sharing a Twin Cabin (Porthole or Inside) with one (only) accompanied standard vehicle, motorbike, or motorbike with sidecar. Max 1 child per cabin. A standard vehicle is less than 2.0 metres wide with a maximum total length less than 6.0 metres (i.e. normal car, people mover, 4WD, Ute). Vehicles 5.31m - 6.00m will incur an extra $10 fee. Towed units and light trucks are not permitted. Passengers and vehicles cannot be added or removed from bookings on this offer. Limited amendments can be made to this fare. Offer is not applicable to Deluxe Cabins. A $5 booking fee per person each way applies when booking via the Customer Contact Centre and Reservations Counter. Red Hot Deal fare conditions apply. Additional conditions apply to passengers, vehicles and accommodation amendments.
Will a 4WD actually fit in the cabin though ?