It is an outdoor wedding but is cocktail attire. Evening might be cool and there is grass all along the property, so leave your stilettos at home!
Alpine is a 30-40 minute drive from downtown. If you are planning to Uber, it will cost you about $30 each way.
The venue is 10 minutes from Viejas and will cost you around $10 each way if you plan to Uber.
I would be happy to answer any questions you have regarding travel or staying in San Diego. My email is butts.emilee@gmail.com and I will get back to you ASAP!