If you are already having sex regularly and aren't using OPKs to time sex, then charting temps and cm would likely be enough for FF to confirm ovulation.
This. I use OPKs because we don't have sex regularly due to my work schedule.
OP, you may consider using an OPK around 10:00PM or before you go to bed. You could also try using FMU instead of SMU. I know most instructions say SMU, but give FMU a try. If you only surge for 12 hours or so and are getting darker OPKs at 10:00AM, it's possible your surge is early in the morning or late at night.