Flight
Southwest has lots of well priced flights into San Diego, but the sooner you book the better. 4th of July is very popular here so flights will begin to book up the closer we get.
Hotel
This is a great historic hotel on the island, but on the expensive end. It will also book quickly leading up to the holiday.
Hotel
Hotel
Hotel
Travel Note
There are not a ton of home rentals on the island, but there are a lot of great options in San Diego and it is a very short drive across the bridge to get to the wedding venue.
Travel Note
Same with VRBO, but I did find listings here that I did not find on Airbnb.