How many hills? If I remember right the freeways around there are pretty flat. Do you have a Strava or RideWithGPS route?
If you're doing 200 mile rides at 15 MPH, then you're likely just fine.
Sure you don't want to do your ride in 2 days?
As mentioned above, gear vs motel touring makes a difference.
Also, have you done multi-day rides? Back to back centuries? My biggest thought is that one always feels a little hung-over on day two, and probably day three. The feeling subsides a bit later in a longer ride.
However, if you haven't done multi-day rides, then perhaps try a few weekends with back-to-back century rides, just to prepare yourself for that second day. Carrying your touring gear would also be good.