Canadian Rockies/Vancouver/Seattle trip in August

Will fly from NYC and visit Canadian Rockies/Vancouver/Seattle in 2-week trip. Only hu*****and will drive. There are two options on flight and car rental:

1. Fly to Calgary one way, and back from Seattle. Car rental in Calgary and drop off at Seattle (different location/country).

2. Fly to Seattle round trip and car rental in Seattle only (same location car rental). There is a lot of driving involved.

Is there any Chinatown bus service from Seattle/Vancouver to Rockies? Or any good Chinese travel company you may recommend?

Thank you in advance!