Boltbusはチェックインバッグは一個に限られており、それ以上は追加料金を払っても受け付けていないようです。それも自分でバスの下の荷物入れに出し入れし、バス会社は一切責任を持たないようです。因みにBoltbusの荷物の持ち込みの規定を牡蠣二貼り付けています。ご参考まで。

Baggage

BoltBus does not provide checked baggage service and assumes no liability of any kind for items/baggage placed onboard or underneath the bus in its baggage bins.
You are responsible for placing your bag into the baggage bin and retrieving it at your destination.
If you need assistance, ask, and the driver will assist you.
Passengers are restricted to one (1) bag to be placed under the bus and two (2) carry-on bags, such as a purse or backpack. Carry-on bags should be small enough to fit into the overhead bins.
Passengers crossing the United States / Canadian border are solely responsible for removing and clearing all personal items and luggage through customs and immigration.
Passengers are responsible for ensuring all contents of personal items and luggage are legally permissible by state, federal and provincial laws.
We do not allow the transport of weapons of any kind or any material that would be classified by the DOT as a hazardous material. (Acids, ammunition, animals, combustible liquids, compressed gases, corpses, cremated remains, explosives, firearms of all types, fireworks, flammable liquids, furniture, hazardous materials, poisons, radioactive materials, etc.),
Each customer must retrieve his or her bags next to the bus at your final destination.
No pets may be transported as baggage.

シアトル近郊にはアウトレット・モールは二箇所あります。一つは東に車で約３０分、もう一つは北で共に車で４０分で共にダウンタウンからのシャトルバス便があります。料金はそれぞれ＄３２と＄４０です。Sea-Tac空港からのインもあります。