We did not reserve any hotel blocks, but here are some places to stay in the area. We highly recommend having a designated driver, because an Uber is really hard to get in Valley Center.
Hotel
Harrah's Resort Southern California
777 South Resort Drive, Valley Center, CA 92082
Hotel
Valley View Casino & Hotel
16300 Nyemii Pass Road, Valley Center, CA 92082
This is the closest to the venue, but the others do not have that much of a difference.
Hotel
Pala Casino Spa Resort
11154 California 76, Pala, CA 92059
Hotel
Woods Valley Kampground & RV Park
15236 Woods Valley Road, Valley Center, CA 92082
This is a campground, the most kids friendly out of all of the options.