It takes a little over four hours to drive from Brisbane to one of the jumping-off points to catch the barge to K'gari. There are barges departing from Inskip Point and River Heads which is a 20-minute drive south of Hervey Bay. It's possible to take your 4WD on the ferry or walk on as a foot passenger. Remember to get your 4WD vehicle set up to drive on sand before you get off the barge, or you could get bogged.