If you are looking for things to do while counting down the hours until the ceremony starts (josh and hailey definitely will be counting down), there are a few stores you can browse through:
TJ Maxx on Thousand Oaks Blvd is a great place to grab any last minute accessories you may have left at home.
Michael's is across the street from TJ Maxx and is a great place to get post-Christmas Christmas decorations! They will be like 75% off for sure.
Agoura Hills Town Center is a small shopping mall across the street from the venue! Hailey highly recommends visiting the running shoe store Fleet Feet next to the mall to look at some cool kicks.