SeaTac DoubleTree Hotel

This is a huge hotel. If you can possibly stay in the tower, I think you will be happier in the long run. There are so many different wings in this hotel is easy to get lost. Anytime I don't stay in the tower, I end up on the wrong floor trying to find my actual room.   

You will find great and frequent shuttle service to and from the airport. If you use self parking, however, you will find that the parking lot is so spread out you are unlikely to be parked in the right area when you are checking in. Once you figure out what wing your room is in, then you should be able to find parking better parking. Just be aware if you are staying in the tower use the the back parking lot. It is much closer and more convenient.