Flight
There are several airports in the area, but San Diego is the most convenient. It is about an hour drive from San Diego to Temecula, so you will need to rent a car. You can also try Ontario International Airport (ONT) or John Wayne Airport in Santa Ana (SNA). They are both a little over an hour from Temecula. Los Angeles (LAX) is about a two hour drive from Temecula, and can be worse with traffic, but it is an option as well.
Hotel
Call and mention the Crowley/Buesing wedding by February 1, 2019 to get the discounted rate.