Based on these popular charts:
90% charge is about 13.5v. So knock down your 14.x charging to here.
I would set your float to .05v below where your battery settles in an hour (this prevents micro-cycling).
I would put low voltage warning around 12.8v (20%) and disconnect at 12.6 (10%).
See how this works with YOUR batteries and anxiety levels (this is conservative so should be stress free). If you need more out of your batteries while traveling, charge higher, like to 13.8v (my 95% for MY battery).
FWIW, when my RV sits in my driveway, I turn off charging (solar cutoff breaker) and let batteries sit around 13.2v. A couple days before a trip I will turn on charging to 13.8v so fully charged.