Canadian Rockies national parks from the Bay Area: South Bay: Google Maps route

Drive through Idaho, reach Banff first.
https://maps.google.com/maps?saddr=Santa+Clara,+CA+95051&daddr=banff+national+park+to:Jasper+National+Park,+Jasper,+AB,+Canada+to:Yoho+National+Park,+Field,+BC,+Canada+to:Glacier+National+Park,+Columbia-Shuswap+A,+BC,+Canada+to:Mount+Revelstoke+National+Park,+Mount+Revelstoke+National+Park,+Columbia-Shuswap+B,+BC,+Canada+to:Kootenay+National+Park,+East+Kootenay+G,+BC,+Canada+to:Waterton-Glacier+International+Peace+Park,+Canada+to:95051&hl=en&ll=50.798991,-117.432861&spn=5.08372,16.688232&sll=51.320314,-117.020874&sspn=2.513098,8.344116&geocode=FdQQOgIdBba6-ClpjSIhDcqPgDHJTs5GZSRaoA%3BFbB8DAMdFREb-SHm18qsaOKdwCmVkZKMK2Z3UzHm18qsaOKdwA%3BFbDmJAMddev0-CGS0ZvObUpy4Skbh0KRyymDUzGS0ZvObUpy4Q%3BFatREQMdWxQN-SF1b4_Y2-mc8ilTEEkhO955UzF1b4_Y2-mc8g%3BFVADDgMdyw79-CG5DtqbFKBE8CnFZ34mRQh5UzG5DtqbFKBE8A%3BFUV4CwMdgHb3-CnJosVKPjx5UzFziW_HyuHAnQ%3BFTBiBgMdAPsV-SFpniUMIUiaTin9_37pJgZ6UzFpniUMIUiaTg%3BFUCu6wIdBcU1-SlX9NsxkFpvUzEjBuZ3FEy4wQ%3BFdQQOgIdBba6-ClpjSIhDcqPgDHJTs5GZSRaoA&oq=kootenay+na&mra=ls&t=m&z=7

Drive through Seattle/Vancouver, reach Jasper first, shorter route.
https://maps.google.com/maps?saddr=Santa+Clara,+CA+95051&daddr=Jasper+National+Park,+Jasper,+AB,+Canada+to:Mount+Revelstoke+National+Park,+Mount+Revelstoke+National+Park,+Columbia-Shuswap+B,+BC,+Canada+to:Glacier+National+Park,+Columbia-Shuswap+A,+BC,+Canada+to:Yoho+National+Park,+Field,+BC,+Canada+to:banff+national+park+to:Kootenay+National+Park,+East+Kootenay+G,+BC,+Canada+to:Waterton-Glacier+International+Peace+Park,+Canada+to:95051&hl=en&ll=50.847573,-115.718994&spn=5.376472,16.688232&sll=45.196639,-117.666964&sspn=23.997038,66.75293&geocode=FdQQOgIdBba6-ClpjSIhDcqPgDHJTs5GZSRaoA%3BFbDmJAMddev0-CGS0ZvObUpy4Skbh0KRyymDUzGS0ZvObUpy4Q%3BFUV4CwMdgHb3-CnJosVKPjx5UzFziW_HyuHAnQ%3BFVADDgMdyw79-CG5DtqbFKBE8CnFZ34mRQh5UzG5DtqbFKBE8A%3BFatREQMdWxQN-SF1b4_Y2-mc8ilTEEkhO955UzF1b4_Y2-mc8g%3BFbB8DAMdFREb-SHm18qsaOKdwCmVkZKMK2Z3UzHm18qsaOKdwA%3BFTBiBgMdAPsV-SFpniUMIUiaTin9_37pJgZ6UzFpniUMIUiaTg%3BFUCu6wIdBcU1-SlX9NsxkFpvUzEjBuZ3FEy4wQ%3BFdQQOgIdBba6-ClpjSIhDcqPgDHJTs5GZSRaoA&mra=ps&t=m&z=7

Bus tour operators from the Bay Area

Many sites are travel consolidators. Here are the actual bus tour operators.
http://www.lassentours.com/
http://www.joyholiday.com/en/
http://www.americaasia.com