Vacation to Sunshine Coast?

The ferry is no big deal, usually runs on time and except for Thanksgiving weekend and possibly Friday nights, there shouldn't be any overloads at that time of year but you can reserve if you like. Costs extra. The weather could well be very wet and windy, so I hope the place you want to stay is nice and cosy. Bring rain gear if you want to do outdoor stuff. Yes, get a car. You won't be going very many places at all without one. Sunshine Coast is pretty spread out.