It is a 30+ minute walk from the Sprinter Station, not sure about buses, and you would be starting in La Mesa, so I would recommend paying for a direct ride there if you can.
Uber is your best bet.
Yep, what they said :)
Uber or rent a car, given how far it is from La Mesa.
La mesa is pretty far from Vista. Public transportation will take all day. Call a cab or Uber would be the best bet.
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