Do I need a 4x4 or could I get stuck on the road up there or back? I'm flying into Seattle and driving up to Whistler the first week of January. All the rental car companies forbid putting chains on a rental car so I thought that getting a 4x4 would let us get by if there are chain restrictions. I'm also worried about bad weather the day we have to fly out and then getting stuck without chains on the road out and missing our flights.